891552772 has 24 divisors (see below), whose sum is σ = 1776059712. Its totient is φ = 387631200.

The previous prime is 891552769. The next prime is 891552791. The reversal of 891552772 is 277255198.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439479 + ... + 441502.

It is an arithmetic number, because the mean of its divisors is an integer number (74002488).

Almost surely, 2^891552772 is an apocalyptic number.

It is an amenable number.

891552772 is a deficient number, since it is larger than the sum of its proper divisors (884506940).

891552772 is a wasteful number, since it uses less digits than its factorization.

891552772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881019 (or 881017 counting only the distinct ones).

The product of its digits is 352800, while the sum is 46.

The square root of 891552772 is about 29858.8809569280. The cubic root of 891552772 is about 962.4592517072.

The spelling of 891552772 in words is "eight hundred ninety-one million, five hundred fifty-two thousand, seven hundred seventy-two".