891239968 has 24 divisors (see below), whose sum is σ = 1756620432. Its totient is φ = 445114176.

The previous prime is 891239959. The next prime is 891239983. The reversal of 891239968 is 869932198.

891239968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 13671 + ... + 44377.

It is an arithmetic number, because the mean of its divisors is an integer number (73192518).

Almost surely, 2^891239968 is an apocalyptic number.

It is an amenable number.

891239968 is a deficient number, since it is larger than the sum of its proper divisors (865380464).

891239968 is a wasteful number, since it uses less digits than its factorization.

891239968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31624 (or 31616 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The square root of 891239968 is about 29853.6424578308. The cubic root of 891239968 is about 962.3466779559.

The spelling of 891239968 in words is "eight hundred ninety-one million, two hundred thirty-nine thousand, nine hundred sixty-eight".