974187690 has 128 divisors (see below), whose sum is σ = 2743967232. Its totient is φ = 216760320.

The previous prime is 974187677. The next prime is 974187707. The reversal of 974187690 is 96781479.

It is a super-2 number, since 2×974187690² = 1898083310695072200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1447194 + ... + 1447866.

It is an arithmetic number, because the mean of its divisors is an integer number (21437244).

Almost surely, 2^974187690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 974187690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1371983616).

974187690 is an abundant number, since it is smaller than the sum of its proper divisors (1769779542).

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

974187690 is a wasteful number, since it uses less digits than its factorization.

974187690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 974187690 is about 31211.9799115660. The cubic root of 974187690 is about 991.3207858397.

The spelling of 974187690 in words is "nine hundred seventy-four million, one hundred eighty-seven thousand, six hundred ninety".