399294164 has 12 divisors (see below), whose sum is σ = 739868724. Its totient is φ = 187903104.

The previous prime is 399294163. The next prime is 399294169. The reversal of 399294164 is 461492993.

It can be written as a sum of positive squares in 2 ways, for example, as 265429264 + 133864900 = 16292^2 + 11570^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399294163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2935919 + ... + 2936054.

It is an arithmetic number, because the mean of its divisors is an integer number (61655727).

Almost surely, 2^399294164 is an apocalyptic number.

399294164 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

399294164 is a deficient number, since it is larger than the sum of its proper divisors (340574560).

399294164 is a wasteful number, since it uses less digits than its factorization.

399294164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5871994 (or 5871992 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 399294164 is about 19982.3463086796. The cubic root of 399294164 is about 736.3726575516.

The spelling of 399294164 in words is "three hundred ninety-nine million, two hundred ninety-four thousand, one hundred sixty-four".