328615057 has 4 divisors (see below), whose sum is σ = 330514740. Its totient is φ = 326715376.

The previous prime is 328615039. The next prime is 328615061. The reversal of 328615057 is 750516823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750516823 = 7 ⋅107216689.

It can be written as a sum of positive squares in 2 ways, for example, as 319122496 + 9492561 = 17864^2 + 3081^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328615057 is a prime.

It is a super-2 number, since 2×328615057² = 215975711374226498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328615657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 949582 + ... + 949927.

It is an arithmetic number, because the mean of its divisors is an integer number (82628685).

Almost surely, 2^328615057 is an apocalyptic number.

It is an amenable number.

328615057 is a deficient number, since it is larger than the sum of its proper divisors (1899683).

328615057 is a wasteful number, since it uses less digits than its factorization.

328615057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899682.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 328615057 is about 18127.7427442029. The cubic root of 328615057 is about 690.0742460189.

The spelling of 328615057 in words is "three hundred twenty-eight million, six hundred fifteen thousand, fifty-seven".