390105404 has 36 divisors (see below), whose sum is σ = 751844520. Its totient is φ = 176978880.

The previous prime is 390105403. The next prime is 390105433. The reversal of 390105404 is 404501093.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390105403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34994 + ... + 44774.

It is an arithmetic number, because the mean of its divisors is an integer number (20884570).

Almost surely, 2^390105404 is an apocalyptic number.

It is an amenable number.

390105404 is a deficient number, since it is larger than the sum of its proper divisors (361739116).

390105404 is a wasteful number, since it uses less digits than its factorization.

390105404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9870 (or 9855 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 390105404 is about 19751.0861473490. The cubic root of 390105404 is about 730.6801717132.

Adding to 390105404 its reverse (404501093), we get a palindrome (794606497).

The spelling of 390105404 in words is "three hundred ninety million, one hundred five thousand, four hundred four".