232566640 has 80 divisors (see below), whose sum is σ = 553223520. Its totient is φ = 90905600.

The previous prime is 232566623. The next prime is 232566671. The reversal of 232566640 is 46665232.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 232566596 and 232566605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864426 + ... + 864694.

It is an arithmetic number, because the mean of its divisors is an integer number (6915294).

Almost surely, 2^232566640 is an apocalyptic number.

232566640 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 232566640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276611760).

232566640 is an abundant number, since it is smaller than the sum of its proper divisors (320656880).

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

232566640 is a wasteful number, since it uses less digits than its factorization.

232566640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 232566640 is about 15250.1357371008. The cubic root of 232566640 is about 614.9632163427.

The spelling of 232566640 in words is "two hundred thirty-two million, five hundred sixty-six thousand, six hundred forty".