390947122 has 4 divisors (see below), whose sum is σ = 586420686. Its totient is φ = 195473560.

The previous prime is 390947119. The next prime is 390947129. The reversal of 390947122 is 221749093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221749093 = 743 ⋅298451.

It can be written as a sum of positive squares in only one way, i.e., 357550281 + 33396841 = 18909^2 + 5779^2 .

It is not an unprimeable number, because it can be changed into a prime (390947129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97736779 + ... + 97736782.

Almost surely, 2^390947122 is an apocalyptic number.

390947122 is a deficient number, since it is larger than the sum of its proper divisors (195473564).

390947122 is a wasteful number, since it uses less digits than its factorization.

390947122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195473563.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 390947122 is about 19772.3828103747. The cubic root of 390947122 is about 731.2053159732.

The spelling of 390947122 in words is "three hundred ninety million, nine hundred forty-seven thousand, one hundred twenty-two".