390332561 has 16 divisors (see below), whose sum is σ = 415435200. Its totient is φ = 365715648.

The previous prime is 390332539. The next prime is 390332567. The reversal of 390332561 is 165233093.

It is not a de Polignac number, because 390332561 - 2⁶ = 390332497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390332567) 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, 1231175 + ... + 1231491.

It is an arithmetic number, because the mean of its divisors is an integer number (25964700).

Almost surely, 2^390332561 is an apocalyptic number.

It is an amenable number.

390332561 is a deficient number, since it is larger than the sum of its proper divisors (25102639).

390332561 is a wasteful number, since it uses less digits than its factorization.

390332561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its (nonzero) digits is 14580, while the sum is 32.

The square root of 390332561 is about 19756.8358043488. The cubic root of 390332561 is about 730.8219683559.

The spelling of 390332561 in words is "three hundred ninety million, three hundred thirty-two thousand, five hundred sixty-one".