390970478 has 4 divisors (see below), whose sum is σ = 586455720. Its totient is φ = 195485238.

The previous prime is 390970477. The next prime is 390970501. The reversal of 390970478 is 874079093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874079093 = 541 ⋅1615673.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390970477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97742618 + ... + 97742621.

It is an arithmetic number, because the mean of its divisors is an integer number (146613930).

Almost surely, 2^390970478 is an apocalyptic number.

390970478 is a deficient number, since it is larger than the sum of its proper divisors (195485242).

390970478 is a wasteful number, since it uses less digits than its factorization.

390970478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195485241.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 390970478 is about 19772.9734233372. The cubic root of 390970478 is about 731.2198769289.

The spelling of 390970478 in words is "three hundred ninety million, nine hundred seventy thousand, four hundred seventy-eight".