399086394 has 32 divisors (see below), whose sum is σ = 920280960. Its totient is φ = 113014272.

The previous prime is 399086351. The next prime is 399086399. The reversal of 399086394 is 493680993.

It is not an unprimeable number, because it can be changed into a prime (399086399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37299 + ... + 46790.

It is an arithmetic number, because the mean of its divisors is an integer number (28758780).

Almost surely, 2^399086394 is an apocalyptic number.

399086394 is an abundant number, since it is smaller than the sum of its proper divisors (521194566).

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

399086394 is a wasteful number, since it uses less digits than its factorization.

399086394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84214.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The square root of 399086394 is about 19977.1467932736. The cubic root of 399086394 is about 736.2449132256.

The spelling of 399086394 in words is "three hundred ninety-nine million, eighty-six thousand, three hundred ninety-four".