390420732906 has 48 divisors (see below), whose sum is σ = 861593174208. Its totient is φ = 127741521600.

The previous prime is 390420732893. The next prime is 390420732931. The reversal of 390420732906 is 609237024093.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237150 + ... + 914921.

It is an arithmetic number, because the mean of its divisors is an integer number (17949857796).

Almost surely, 2^390420732906 is an apocalyptic number.

390420732906 is an abundant number, since it is smaller than the sum of its proper divisors (471172441302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390420732906 is a wasteful number, since it uses less digits than its factorization.

390420732906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152427 (or 1152424 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

Adding to 390420732906 its reverse (609237024093), we get a palindrome (999657756999).

The spelling of 390420732906 in words is "three hundred ninety billion, four hundred twenty million, seven hundred thirty-two thousand, nine hundred six".