974215640 has 64 divisors (see below), whose sum is σ = 2219616000. Its totient is φ = 384809472.

The previous prime is 974215621. The next prime is 974215657. The reversal of 974215640 is 46512479.

It is a super-2 number, since 2×974215640² = 1898192226441219200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 974215594 and 974215603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1328714 + ... + 1329446.

It is an arithmetic number, because the mean of its divisors is an integer number (34681500).

Almost surely, 2^974215640 is an apocalyptic number.

It is an amenable number.

974215640 is an abundant number, since it is smaller than the sum of its proper divisors (1245400360).

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

974215640 is a wasteful number, since it uses less digits than its factorization.

974215640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 974215640 is about 31212.4276531000. The cubic root of 974215640 is about 991.3302662685.

The spelling of 974215640 in words is "nine hundred seventy-four million, two hundred fifteen thousand, six hundred forty".