232099728 has 80 divisors (see below), whose sum is σ = 707383296. Its totient is φ = 64172160.

The previous prime is 232099727. The next prime is 232099733. The reversal of 232099728 is 827990232.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 232099728.

It is not an unprimeable number, because it can be changed into a prime (232099723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726 + ... + 21557.

Almost surely, 2^232099728 is an apocalyptic number.

232099728 is a gapful number since it is divisible by the number (28) 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 232099728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353691648).

232099728 is an abundant number, since it is smaller than the sum of its proper divisors (475283568).

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

232099728 is a wasteful number, since it uses less digits than its factorization.

232099728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22332 (or 22326 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 232099728 is about 15234.8195919742. The cubic root of 232099728 is about 614.5513973556.

The spelling of 232099728 in words is "two hundred thirty-two million, ninety-nine thousand, seven hundred twenty-eight".