977860090 has 16 divisors (see below), whose sum is σ = 1761422760. Its totient is φ = 390860800.

The previous prime is 977860021. The next prime is 977860133. The reversal of 977860090 is 90068779.

It can be written as a sum of positive squares in 4 ways, for example, as 556912801 + 420947289 = 23599^2 + 20517^2 .

It is a super-2 number, since 2×977860090² = 1912420711229616200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 977860090.

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, 20611 + ... + 48790.

Almost surely, 2^977860090 is an apocalyptic number.

977860090 is a deficient number, since it is larger than the sum of its proper divisors (783562670).

977860090 is a wasteful number, since it uses less digits than its factorization.

977860090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70817.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 977860090 is about 31270.7545479798. The cubic root of 977860090 is about 992.5648860878.

The spelling of 977860090 in words is "nine hundred seventy-seven million, eight hundred sixty thousand, ninety".