977727890 has 16 divisors (see below), whose sum is σ = 1767806208. Its totient is φ = 389336496.

The previous prime is 977727871. The next prime is 977727899. The reversal of 977727890 is 98727779.

977727890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (977727899) 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, 216992 + ... + 221451.

It is an arithmetic number, because the mean of its divisors is an integer number (110487888).

Almost surely, 2^977727890 is an apocalyptic number.

977727890 is a deficient number, since it is larger than the sum of its proper divisors (790078318).

977727890 is a wasteful number, since it uses less digits than its factorization.

977727890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438673.

The product of its (nonzero) digits is 3111696, while the sum is 56.

The square root of 977727890 is about 31268.6406804005. The cubic root of 977727890 is about 992.5201547426.

The spelling of 977727890 in words is "nine hundred seventy-seven million, seven hundred twenty-seven thousand, eight hundred ninety".