399481146 has 20 divisors (see below), whose sum is σ = 895134042. Its totient is φ = 133160328.

The previous prime is 399481141. The next prime is 399481151. The reversal of 399481146 is 641184993.

It is an interprime number because it is at equal distance from previous prime (399481141) and next prime (399481151).

It can be written as a sum of positive squares in only one way, i.e., 278723025 + 120758121 = 16695^2 + 10989^2 .

It is not an unprimeable number, because it can be changed into a prime (399481141) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1232805 + ... + 1233128.

Almost surely, 2^399481146 is an apocalyptic number.

399481146 is an abundant number, since it is smaller than the sum of its proper divisors (495652896).

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

399481146 is a wasteful number, since it uses less digits than its factorization.

399481146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465947 (or 2465938 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 399481146 is about 19987.0244408716. The cubic root of 399481146 is about 736.4875828022.

The spelling of 399481146 in words is "three hundred ninety-nine million, four hundred eighty-one thousand, one hundred forty-six".