961128972 has 18 divisors (see below), whose sum is σ = 2429520548. Its totient is φ = 320376312.

The previous prime is 961128953. The next prime is 961128989. The reversal of 961128972 is 279821169.

961128972 is a `hidden beast` number, since 9 + 611 + 28 + 9 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13348978 + ... + 13349049.

Almost surely, 2^961128972 is an apocalyptic number.

It is an amenable number.

961128972 is an abundant number, since it is smaller than the sum of its proper divisors (1468391576).

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

961128972 is a wasteful number, since it uses less digits than its factorization.

961128972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26698037 (or 26698032 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 961128972 is about 31002.0801237594. The cubic root of 961128972 is about 986.8713844043.

It can be divided in two parts, 9611 and 28972, that added together give a palindrome (38583).

The spelling of 961128972 in words is "nine hundred sixty-one million, one hundred twenty-eight thousand, nine hundred seventy-two".