977252780 has 96 divisors (see below), whose sum is σ = 2383226496. Its totient is φ = 329711616.

The previous prime is 977252779. The next prime is 977252797. The reversal of 977252780 is 87252779.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3802412 + ... + 3802668.

It is an arithmetic number, because the mean of its divisors is an integer number (24825276).

Almost surely, 2^977252780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 977252780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1191613248).

977252780 is an abundant number, since it is smaller than the sum of its proper divisors (1405973716).

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

977252780 is a wasteful number, since it uses less digits than its factorization.

977252780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 977252780 is about 31261.0425290009. The cubic root of 977252780 is about 992.3593626798.

The spelling of 977252780 in words is "nine hundred seventy-seven million, two hundred fifty-two thousand, seven hundred eighty".