230891520 has 112 divisors (see below), whose sum is σ = 739200960. Its totient is φ = 61538304.

The previous prime is 230891513. The next prime is 230891597. The reversal of 230891520 is 25198032.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 16.

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, 121941 + ... + 123819.

Almost surely, 2^230891520 is an apocalyptic number.

230891520 is a gapful number since it is divisible by the number (20) 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 230891520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369600480).

230891520 is an abundant number, since it is smaller than the sum of its proper divisors (508309440).

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

230891520 is an equidigital number, since it uses as much as digits as its factorization.

230891520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 230891520 is about 15195.1150045006. The cubic root of 230891520 is about 613.4831811980.

The spelling of 230891520 in words is "two hundred thirty million, eight hundred ninety-one thousand, five hundred twenty".