328520916 has 18 divisors (see below), whose sum is σ = 830427962. Its totient is φ = 109506960.

The previous prime is 328520911. The next prime is 328520921. The reversal of 328520916 is 619025823.

It is an interprime number because it is at equal distance from previous prime (328520911) and next prime (328520921).

It can be written as a sum of positive squares in only one way, i.e., 311381316 + 17139600 = 17646^2 + 4140^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 9125581 = 328520916 / (3 + 2 + 8 + 5 + 2 + 0 + 9 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328520911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4562755 + ... + 4562826.

Almost surely, 2^328520916 is an apocalyptic number.

328520916 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

328520916 is an abundant number, since it is smaller than the sum of its proper divisors (501907046).

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

328520916 is a wasteful number, since it uses less digits than its factorization.

328520916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9125591 (or 9125586 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 328520916 is about 18125.1459580330. The cubic root of 328520916 is about 690.0083426843.

The spelling of 328520916 in words is "three hundred twenty-eight million, five hundred twenty thousand, nine hundred sixteen".