232400640 has 72 divisors (see below), whose sum is σ = 742241808. Its totient is φ = 61972480.

The previous prime is 232400639. The next prime is 232400677. The reversal of 232400640 is 46004232.

232400640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 26421 + ... + 34100.

It is an arithmetic number, because the mean of its divisors is an integer number (10308914).

Almost surely, 2^232400640 is an apocalyptic number.

232400640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

232400640 is an abundant number, since it is smaller than the sum of its proper divisors (509841168).

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

232400640 is an equidigital number, since it uses as much as digits as its factorization.

232400640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60545 (or 60531 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 232400640 is about 15244.6921910546. The cubic root of 232400640 is about 614.8168666172.

Adding to 232400640 its reverse (46004232), we get a palindrome (278404872).

The spelling of 232400640 in words is "two hundred thirty-two million, four hundred thousand, six hundred forty".