231690720 has 48 divisors (see below), whose sum is σ = 729827280. Its totient is φ = 61784064.

The previous prime is 231690691. The next prime is 231690733. The reversal of 231690720 is 27096132.

It is a tau number, because it is divible by the number of its divisors (48).

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

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, 240865 + ... + 241824.

It is an arithmetic number, because the mean of its divisors is an integer number (15204735).

Almost surely, 2^231690720 is an apocalyptic number.

231690720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231690720 is an abundant number, since it is smaller than the sum of its proper divisors (498136560).

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

231690720 is a wasteful number, since it uses less digits than its factorization.

231690720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482707 (or 482699 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 231690720 is about 15221.3902124609. The cubic root of 231690720 is about 614.1901959700.

The spelling of 231690720 in words is "two hundred thirty-one million, six hundred ninety thousand, seven hundred twenty".