974491638 has 16 divisors (see below), whose sum is σ = 1957496880. Its totient is φ = 323411616.

The previous prime is 974491631. The next prime is 974491643. The reversal of 974491638 is 836194479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974491631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353245 + ... + 355992.

It is an arithmetic number, because the mean of its divisors is an integer number (122343555).

Almost surely, 2^974491638 is an apocalyptic number.

974491638 is an abundant number, since it is smaller than the sum of its proper divisors (983005242).

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

974491638 is a wasteful number, since it uses less digits than its factorization.

974491638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709471.

The product of its digits is 1306368, while the sum is 51.

The square root of 974491638 is about 31216.8486237801. The cubic root of 974491638 is about 991.4238729697.

The spelling of 974491638 in words is "nine hundred seventy-four million, four hundred ninety-one thousand, six hundred thirty-eight".