977913972 has 180 divisors, whose sum is σ = 3071316864. Its totient is φ = 270254880.

The previous prime is 977913961. The next prime is 977914031. The reversal of 977913972 is 279319779.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 491163 + ... + 493149.

Almost surely, 2^977913972 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 977913972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535658432).

977913972 is an abundant number, since it is smaller than the sum of its proper divisors (2093402892).

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

977913972 is a wasteful number, since it uses less digits than its factorization.

977913972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 2030 counting only the distinct ones).

The product of its digits is 1500282, while the sum is 54.

The square root of 977913972 is about 31271.6160759242. The cubic root of 977913972 is about 992.5831165072.

The spelling of 977913972 in words is "nine hundred seventy-seven million, nine hundred thirteen thousand, nine hundred seventy-two".