390730975 has 48 divisors (see below), whose sum is σ = 541679616. Its totient is φ = 278208000.

The previous prime is 390730957. The next prime is 390730979. The reversal of 390730975 is 579037093.

It is not a de Polignac number, because 390730975 - 2¹⁷ = 390599903 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390730979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 618910 + ... + 619540.

It is an arithmetic number, because the mean of its divisors is an integer number (11284992).

Almost surely, 2^390730975 is an apocalyptic number.

390730975 is a deficient number, since it is larger than the sum of its proper divisors (150948641).

390730975 is a wasteful number, since it uses less digits than its factorization.

390730975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 178605, while the sum is 43.

The square root of 390730975 is about 19766.9161732426. The cubic root of 390730975 is about 731.0705347690.

The spelling of 390730975 in words is "three hundred ninety million, seven hundred thirty thousand, nine hundred seventy-five".