891616944 has 40 divisors (see below), whose sum is σ = 2304517680. Its totient is φ = 297054208.

The previous prime is 891616927. The next prime is 891616949. The reversal of 891616944 is 449616198.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 891616893 and 891616902.

It is not an unprimeable number, because it can be changed into a prime (891616949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129952 + ... + 136640.

It is an arithmetic number, because the mean of its divisors is an integer number (57612942).

Almost surely, 2^891616944 is an apocalyptic number.

It is an amenable number.

891616944 is an abundant number, since it is smaller than the sum of its proper divisors (1412900736).

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

891616944 is a wasteful number, since it uses less digits than its factorization.

891616944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9477 (or 9471 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 891616944 is about 29859.9555257539. The cubic root of 891616944 is about 962.4823430505.

The spelling of 891616944 in words is "eight hundred ninety-one million, six hundred sixteen thousand, nine hundred forty-four".