232509990 has 64 divisors (see below), whose sum is σ = 584672256. Its totient is φ = 59064192.

The previous prime is 232509989. The next prime is 232510007. The reversal of 232509990 is 99905232.

It is a Curzon number.

It is a congruent number.

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, 218199 + ... + 219261.

It is an arithmetic number, because the mean of its divisors is an integer number (9135504).

Almost surely, 2^232509990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 232509990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292336128).

232509990 is an abundant number, since it is smaller than the sum of its proper divisors (352162266).

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

232509990 is a wasteful number, since it uses less digits than its factorization.

232509990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 232509990 is about 15248.2782634631. The cubic root of 232509990 is about 614.9132801248.

The spelling of 232509990 in words is "two hundred thirty-two million, five hundred nine thousand, nine hundred ninety".