390472105 has 4 divisors (see below), whose sum is σ = 468566532. Its totient is φ = 312377680.

The previous prime is 390472079. The next prime is 390472111. The reversal of 390472105 is 501274093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501274093 = 19 ⋅26382847.

It can be written as a sum of positive squares in 2 ways, for example, as 153958464 + 236513641 = 12408^2 + 15379^2 .

It is not a de Polignac number, because 390472105 - 2¹⁵ = 390439337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 39047206 + ... + 39047215.

It is an arithmetic number, because the mean of its divisors is an integer number (117141633).

Almost surely, 2^390472105 is an apocalyptic number.

It is an amenable number.

390472105 is a deficient number, since it is larger than the sum of its proper divisors (78094427).

390472105 is an equidigital number, since it uses as much as digits as its factorization.

390472105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78094426.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 390472105 is about 19760.3670259436. The cubic root of 390472105 is about 730.9090476660.

The spelling of 390472105 in words is "three hundred ninety million, four hundred seventy-two thousand, one hundred five".