891545244 has 24 divisors (see below), whose sum is σ = 2147378688. Its totient is φ = 287595120.

The previous prime is 891545233. The next prime is 891545269. The reversal of 891545244 is 442545198.

It is a junction number, because it is equal to n+sod(n) for n = 891545196 and 891545205.

It is a congruent number.

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, 1197942 + ... + 1198685.

It is an arithmetic number, because the mean of its divisors is an integer number (89474112).

Almost surely, 2^891545244 is an apocalyptic number.

It is an amenable number.

891545244 is an abundant number, since it is smaller than the sum of its proper divisors (1255833444).

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

891545244 is a wasteful number, since it uses less digits than its factorization.

891545244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396665 (or 2396663 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 891545244 is about 29858.7548970147. The cubic root of 891545244 is about 962.4565427953.

The spelling of 891545244 in words is "eight hundred ninety-one million, five hundred forty-five thousand, two hundred forty-four".