328565990 has 32 divisors (see below), whose sum is σ = 608788224. Its totient is φ = 127622880.

The previous prime is 328565981. The next prime is 328565999. The reversal of 328565990 is 99565823.

It is an interprime number because it is at equal distance from previous prime (328565981) and next prime (328565999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328565999) 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, 44117 + ... + 51023.

It is an arithmetic number, because the mean of its divisors is an integer number (19024632).

Almost surely, 2^328565990 is an apocalyptic number.

328565990 is a deficient number, since it is larger than the sum of its proper divisors (280222234).

328565990 is a wasteful number, since it uses less digits than its factorization.

328565990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7052.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 328565990 is about 18126.3893260627. The cubic root of 328565990 is about 690.0398982740.

The spelling of 328565990 in words is "three hundred twenty-eight million, five hundred sixty-five thousand, nine hundred ninety".