891889772 has 24 divisors (see below), whose sum is σ = 1578254496. Its totient is φ = 440972928.

The previous prime is 891889771. The next prime is 891889781. The reversal of 891889772 is 277988198.

It is not an unprimeable number, because it can be changed into a prime (891889771) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 416288 + ... + 418424.

It is an arithmetic number, because the mean of its divisors is an integer number (65760604).

Almost surely, 2^891889772 is an apocalyptic number.

It is an amenable number.

891889772 is a deficient number, since it is larger than the sum of its proper divisors (686364724).

891889772 is a wasteful number, since it uses less digits than its factorization.

891889772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257 (or 3255 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 59.

The square root of 891889772 is about 29864.5236359129. The cubic root of 891889772 is about 962.5805037966.

The spelling of 891889772 in words is "eight hundred ninety-one million, eight hundred eighty-nine thousand, seven hundred seventy-two".