891655972 has 12 divisors (see below), whose sum is σ = 1560746880. Its totient is φ = 445728296.

The previous prime is 891655943. The next prime is 891655991. The reversal of 891655972 is 279556198.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2572 + ... + 42307.

It is an arithmetic number, because the mean of its divisors is an integer number (130062240).

Almost surely, 2^891655972 is an apocalyptic number.

It is an amenable number.

891655972 is a deficient number, since it is larger than the sum of its proper divisors (669090908).

891655972 is a wasteful number, since it uses less digits than its factorization.

891655972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49850 (or 49848 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 52.

The square root of 891655972 is about 29860.6090359859. The cubic root of 891655972 is about 962.4963861561.

The spelling of 891655972 in words is "eight hundred ninety-one million, six hundred fifty-five thousand, nine hundred seventy-two".