390742961 has 16 divisors (see below), whose sum is σ = 470808960. Its totient is φ = 316794240.

The previous prime is 390742931. The next prime is 390742967. The reversal of 390742961 is 169247093.

It is not a de Polignac number, because 390742961 - 2¹⁰ = 390741937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390742967) 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, 98741 + ... + 102621.

It is an arithmetic number, because the mean of its divisors is an integer number (29425560).

Almost surely, 2^390742961 is an apocalyptic number.

It is an amenable number.

390742961 is a deficient number, since it is larger than the sum of its proper divisors (80065999).

390742961 is a wasteful number, since it uses less digits than its factorization.

390742961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 390742961 is about 19767.2193542744. The cubic root of 390742961 is about 731.0780100930.

The spelling of 390742961 in words is "three hundred ninety million, seven hundred forty-two thousand, nine hundred sixty-one".