Base | Representation |
---|---|
bin | 1001100000010110110110 |
3 | 11200121011000 |
4 | 21200112312 |
5 | 1114214310 |
6 | 125224130 |
7 | 30115545 |
oct | 11402666 |
9 | 4617130 |
10 | 2491830 |
11 | 1452170 |
12 | a02046 |
13 | 693273 |
14 | 48c15c |
15 | 3434c0 |
hex | 2605b6 |
2491830 has 64 divisors (see below), whose sum is σ = 7257600. Its totient is φ = 603360.
The previous prime is 2491829. The next prime is 2491837. The reversal of 2491830 is 381942.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a junction number, because it is equal to n+sod(n) for n = 2491794 and 2491803.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2491837) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2551 + ... + 3389.
It is an arithmetic number, because the mean of its divisors is an integer number (113400).
22491830 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2491830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3628800).
2491830 is an abundant number, since it is smaller than the sum of its proper divisors (4765770).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2491830 is a wasteful number, since it uses less digits than its factorization.
2491830 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 866 (or 860 counting only the distinct ones).
The product of its (nonzero) digits is 1728, while the sum is 27.
The square root of 2491830 is about 1578.5531349942. The cubic root of 2491830 is about 135.5728742044.
It can be divided in two parts, 2491 and 830, that added together give a triangular number (3321 = T81).
The spelling of 2491830 in words is "two million, four hundred ninety-one thousand, eight hundred thirty".
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