891855120 has 160 divisors (see below), whose sum is σ = 3073803264. Its totient is φ = 212428800.

The previous prime is 891855119. The next prime is 891855143. The reversal of 891855120 is 21558198.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92110 + ... + 101330.

Almost surely, 2^891855120 is an apocalyptic number.

891855120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891855120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1536901632).

891855120 is an abundant number, since it is smaller than the sum of its proper divisors (2181948144).

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

891855120 is a wasteful number, since it uses less digits than its factorization.

891855120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9281 (or 9275 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 39.

The square root of 891855120 is about 29863.9434770427. The cubic root of 891855120 is about 962.5680374685.

The spelling of 891855120 in words is "eight hundred ninety-one million, eight hundred fifty-five thousand, one hundred twenty".