Base | Representation |
---|---|
bin | 1000111100000… |
… | …11011011001000 |
3 | 12020002202010000 |
4 | 10132003123020 |
5 | 123144042313 |
6 | 11235123000 |
7 | 1600244412 |
oct | 436033310 |
9 | 166082100 |
10 | 74987208 |
11 | 39367aaa |
12 | 21143460 |
13 | 126c683a |
14 | 9d5d9b2 |
15 | 68b3673 |
hex | 47836c8 |
74987208 has 80 divisors (see below), whose sum is σ = 212376780. Its totient is φ = 24717312.
The previous prime is 74987207. The next prime is 74987249. The reversal of 74987208 is 80278947.
It can be written as a sum of positive squares in 2 ways, for example, as 74960964 + 26244 = 8658^2 + 162^2 .
It is not an unprimeable number, because it can be changed into a prime (74987201) by changing a digit.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 62260 + ... + 63452.
Almost surely, 274987208 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 74987208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106188390).
74987208 is an abundant number, since it is smaller than the sum of its proper divisors (137389572).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
74987208 is a wasteful number, since it uses less digits than its factorization.
74987208 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1308 (or 1295 counting only the distinct ones).
The product of its (nonzero) digits is 225792, while the sum is 45.
The square root of 74987208 is about 8659.5154598857. The cubic root of 74987208 is about 421.6923553084.
It can be divided in two parts, 7498 and 7208, that added together give a triangular number (14706 = T171).
The spelling of 74987208 in words is "seventy-four million, nine hundred eighty-seven thousand, two hundred eight".
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