972722556 has 144 divisors (see below), whose sum is σ = 2810953600. Its totient is φ = 281149056.

The previous prime is 972722551. The next prime is 972722579. The reversal of 972722556 is 655227279.

972722556 is a `hidden beast` number, since 9 + 72 + 7 + 22 + 556 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972722551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1235595 + ... + 1236381.

Almost surely, 2^972722556 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 972722556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1405476800).

972722556 is an abundant number, since it is smaller than the sum of its proper divisors (1838231044).

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

972722556 is a wasteful number, since it uses less digits than its factorization.

972722556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 963 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 972722556 is about 31188.5003807493. The cubic root of 972722556 is about 990.8235693602.

The spelling of 972722556 in words is "nine hundred seventy-two million, seven hundred twenty-two thousand, five hundred fifty-six".