325640988 has 72 divisors (see below), whose sum is σ = 857816960. Its totient is φ = 104042880.

The previous prime is 325640927. The next prime is 325640993. The reversal of 325640988 is 889046523.

325640988 is a `hidden beast` number, since 3 + 2 + 564 + 0 + 9 + 88 = 666.

It is a super-2 number, since 2×325640988² = 212084106131232288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120306 + ... + 122982.

Almost surely, 2^325640988 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 325640988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428908480).

325640988 is an abundant number, since it is smaller than the sum of its proper divisors (532175972).

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

325640988 is a wasteful number, since it uses less digits than its factorization.

325640988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827 (or 2822 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 325640988 is about 18045.5254287593. The cubic root of 325640988 is about 687.9861380613.

It can be divided in two parts, 3256 and 40988, that added together give a palindrome (44244).

The spelling of 325640988 in words is "three hundred twenty-five million, six hundred forty thousand, nine hundred eighty-eight".