977971140 has 72 divisors (see below), whose sum is σ = 2973821760. Its totient is φ = 260149824.

The previous prime is 977971139. The next prime is 977971151. The reversal of 977971140 is 41179779.

977971140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68937 + ... + 81903.

It is an arithmetic number, because the mean of its divisors is an integer number (41303080).

Almost surely, 2^977971140 is an apocalyptic number.

977971140 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 977971140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486910880).

977971140 is an abundant number, since it is smaller than the sum of its proper divisors (1995850620).

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

977971140 is a wasteful number, since it uses less digits than its factorization.

977971140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13401 (or 13396 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 45.

The square root of 977971140 is about 31272.5301183003. The cubic root of 977971140 is about 992.6024579788.

The spelling of 977971140 in words is "nine hundred seventy-seven million, nine hundred seventy-one thousand, one hundred forty".