390432641 has 4 divisors (see below), whose sum is σ = 390643632. Its totient is φ = 390221652.

The previous prime is 390432629. The next prime is 390432649. The reversal of 390432641 is 146234093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 390432641 - 2²² = 386238337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 390432598 and 390432607.

It is not an unprimeable number, because it can be changed into a prime (390432649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102695 + ... + 106428.

It is an arithmetic number, because the mean of its divisors is an integer number (97660908).

Almost surely, 2^390432641 is an apocalyptic number.

It is an amenable number.

390432641 is a deficient number, since it is larger than the sum of its proper divisors (210991).

390432641 is a wasteful number, since it uses less digits than its factorization.

390432641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210990.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 390432641 is about 19759.3684362633. The cubic root of 390432641 is about 730.8844231443.

The spelling of 390432641 in words is "three hundred ninety million, four hundred thirty-two thousand, six hundred forty-one".