977971320 has 80 divisors (see below), whose sum is σ = 3287081160. Its totient is φ = 260791488.

The previous prime is 977971297. The next prime is 977971361. The reversal of 977971320 is 23179779.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 147682 + ... + 154161.

Almost surely, 2^977971320 is an apocalyptic number.

977971320 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

977971320 is an abundant number, since it is smaller than the sum of its proper divisors (2309109840).

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

977971320 is a wasteful number, since it uses less digits than its factorization.

977971320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301866 (or 301853 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The square root of 977971320 is about 31272.5329962253. The cubic root of 977971320 is about 992.6025188765.

The spelling of 977971320 in words is "nine hundred seventy-seven million, nine hundred seventy-one thousand, three hundred twenty".