Base | Representation |
---|---|
bin | 10001110110011… |
… | …11100010000000 |
3 | 101102202222102022 |
4 | 20323033202000 |
5 | 301313412330 |
6 | 22505341012 |
7 | 3465556424 |
oct | 1073174200 |
9 | 342688368 |
10 | 149747840 |
11 | 7758a850 |
12 | 42197768 |
13 | 250411b8 |
14 | 15c60b84 |
15 | d22eae5 |
hex | 8ecf880 |
149747840 has 128 divisors (see below), whose sum is σ = 396576000. Its totient is φ = 53616640.
The previous prime is 149747839. The next prime is 149747869. The reversal of 149747840 is 48747941.
It is a tau number, because it is divible by the number of its divisors (128).
It is a Harshad number since it is a multiple of its sum of digits (44).
It is a junction number, because it is equal to n+sod(n) for n = 149747791 and 149747800.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 626441 + ... + 626679.
It is an arithmetic number, because the mean of its divisors is an integer number (3098250).
Almost surely, 2149747840 is an apocalyptic number.
149747840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 149747840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198288000).
149747840 is an abundant number, since it is smaller than the sum of its proper divisors (246828160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
149747840 is a wasteful number, since it uses less digits than its factorization.
149747840 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 358 (or 346 counting only the distinct ones).
The product of its (nonzero) digits is 225792, while the sum is 44.
The square root of 149747840 is about 12237.1499949947. The cubic root of 149747840 is about 531.0313842823.
The spelling of 149747840 in words is "one hundred forty-nine million, seven hundred forty-seven thousand, eight hundred forty".
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