399051108 has 36 divisors (see below), whose sum is σ = 1009548540. Its totient is φ = 132906816.

The previous prime is 399051097. The next prime is 399051109. The reversal of 399051108 is 801150993.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 165328164 + 233722944 = 12858^2 + 15288^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (399051109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47566 + ... + 55322.

It is an arithmetic number, because the mean of its divisors is an integer number (28043015).

Almost surely, 2^399051108 is an apocalyptic number.

It is an amenable number.

399051108 is an abundant number, since it is smaller than the sum of its proper divisors (610497432).

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

399051108 is a wasteful number, since it uses less digits than its factorization.

399051108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9196 (or 9191 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 399051108 is about 19976.2636146002. The cubic root of 399051108 is about 736.2232137439.

The spelling of 399051108 in words is "three hundred ninety-nine million, fifty-one thousand, one hundred eight".