977990 has 16 divisors (see below), whose sum is σ = 1896048. Its totient is φ = 361056.

The previous prime is 977971. The next prime is 978001. The reversal of 977990 is 99779.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3632 + ... + 3891.

It is an arithmetic number, because the mean of its divisors is an integer number (118503).

2⁹⁷⁷⁹⁹⁰ is an apocalyptic number.

977990 is a deficient number, since it is larger than the sum of its proper divisors (918058).

977990 is a wasteful number, since it uses less digits than its factorization.

977990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7543.

The product of its (nonzero) digits is 35721, while the sum is 41.

The square root of 977990 is about 988.9337692687. The cubic root of 977990 is about 99.2608838659.

The spelling of 977990 in words is "nine hundred seventy-seven thousand, nine hundred ninety".