3257298640 has 40 divisors (see below), whose sum is σ = 7902494208. Its totient is φ = 1246270080.

The previous prime is 3257298613. The next prime is 3257298641. The reversal of 3257298640 is 468927523.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3257298641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883296 + ... + 886975.

Almost surely, 2^3257298640 is an apocalyptic number.

It is an amenable number.

3257298640 is an abundant number, since it is smaller than the sum of its proper divisors (4645195568).

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

3257298640 is a wasteful number, since it uses less digits than its factorization.

3257298640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770307 (or 1770301 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 3257298640 is about 57072.7486634383. The cubic root of 3257298640 is about 1482.3560355658.

The spelling of 3257298640 in words is "three billion, two hundred fifty-seven million, two hundred ninety-eight thousand, six hundred forty".