975989640 has 32 divisors (see below), whose sum is σ = 2927969280. Its totient is φ = 260263872.

The previous prime is 975989611. The next prime is 975989671. The reversal of 975989640 is 46989579.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4066504 + ... + 4066743.

It is an arithmetic number, because the mean of its divisors is an integer number (91499040).

Almost surely, 2^975989640 is an apocalyptic number.

It is an amenable number.

975989640 is an abundant number, since it is smaller than the sum of its proper divisors (1951979640).

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

975989640 is a wasteful number, since it uses less digits than its factorization.

975989640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8133261 (or 8133257 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 57.

The square root of 975989640 is about 31240.8328954271. The cubic root of 975989640 is about 991.9316230402.

It can be divided in two parts, 9759 and 89640, that added together give a palindrome (99399).

The spelling of 975989640 in words is "nine hundred seventy-five million, nine hundred eighty-nine thousand, six hundred forty".