974781972 has 72 divisors (see below), whose sum is σ = 2684702720. Its totient is φ = 305804160.

The previous prime is 974781971. The next prime is 974781979. The reversal of 974781972 is 279187479.

974781972 is a `hidden beast` number, since 97 + 478 + 19 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974781971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15597 + ... + 46827.

Almost surely, 2^974781972 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 974781972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1342351360).

974781972 is an abundant number, since it is smaller than the sum of its proper divisors (1709920748).

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

974781972 is a wasteful number, since it uses less digits than its factorization.

974781972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31278 (or 31253 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 974781972 is about 31221.4985546818. The cubic root of 974781972 is about 991.5223227549.

It can be divided in two parts, 9747 and 81972, that added together give a palindrome (91719).

The spelling of 974781972 in words is "nine hundred seventy-four million, seven hundred eighty-one thousand, nine hundred seventy-two".