390099994 has 16 divisors (see below), whose sum is σ = 606168360. Its totient is φ = 188151040.

The previous prime is 390099979. The next prime is 390100013. The reversal of 390099994 is 499990093.

It can be written as a sum of positive squares in 4 ways, for example, as 194239969 + 195860025 = 13937^2 + 13995^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19429 + ... + 34024.

Almost surely, 2^390099994 is an apocalyptic number.

390099994 is a deficient number, since it is larger than the sum of its proper divisors (216068366).

390099994 is a wasteful number, since it uses less digits than its factorization.

390099994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53585.

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 390099994 is about 19750.9491923806. The cubic root of 390099994 is about 730.6767939953.

It can be divided in two parts, 3900999 and 94, that added together give a palindrome (3901093).

The spelling of 390099994 in words is "three hundred ninety million, ninety-nine thousand, nine hundred ninety-four".