891936464 has 40 divisors (see below), whose sum is σ = 1795837440. Its totient is φ = 428688000.

The previous prime is 891936439. The next prime is 891936469. The reversal of 891936464 is 464639198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891936469) 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, 68942 + ... + 80850.

It is an arithmetic number, because the mean of its divisors is an integer number (44895936).

Almost surely, 2^891936464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891936464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897918720).

891936464 is an abundant number, since it is smaller than the sum of its proper divisors (903900976).

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

891936464 is a wasteful number, since it uses less digits than its factorization.

891936464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12099 (or 12093 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 50.

The square root of 891936464 is about 29865.3053558808. The cubic root of 891936464 is about 962.5973010983.

The spelling of 891936464 in words is "eight hundred ninety-one million, nine hundred thirty-six thousand, four hundred sixty-four".