3251492640 has 216 divisors, whose sum is σ = 12196774044. Its totient is φ = 788198400.

The previous prime is 3251492627. The next prime is 3251492669. The reversal of 3251492640 is 462941523.

It is a happy number.

3251492640 is a `hidden beast` number, since 3 + 2 + 5 + 1 + 4 + 9 + 2 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2943279504 + 308213136 = 54252^2 + 17556^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3251492595 and 3251492604.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 164910 + ... + 183570.

Almost surely, 2^3251492640 is an apocalyptic number.

3251492640 is a gapful number since it is divisible by the number (30) 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 3251492640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6098387022).

3251492640 is an abundant number, since it is smaller than the sum of its proper divisors (8945281404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3251492640 is a wasteful number, since it uses less digits than its factorization.

3251492640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18704 (or 18682 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 3251492640 is about 57021.8610709963. The cubic root of 3251492640 is about 1481.4747656572.

The spelling of 3251492640 in words is "three billion, two hundred fifty-one million, four hundred ninety-two thousand, six hundred forty".