399153042 has 32 divisors (see below), whose sum is σ = 917596800. Its totient is φ = 128462544.

The previous prime is 399153023. The next prime is 399153043. The reversal of 399153042 is 240351993.

It is a happy number.

399153042 is a `hidden beast` number, since 39 + 91 + 530 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 399152988 and 399153006.

It is not an unprimeable number, because it can be changed into a prime (399153043) 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, 125878 + ... + 129009.

It is an arithmetic number, because the mean of its divisors is an integer number (28674900).

Almost surely, 2^399153042 is an apocalyptic number.

399153042 is an abundant number, since it is smaller than the sum of its proper divisors (518443758).

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

399153042 is a wasteful number, since it uses less digits than its factorization.

399153042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254927 (or 254921 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 399153042 is about 19978.8148297140. The cubic root of 399153042 is about 736.2858955964.

The spelling of 399153042 in words is "three hundred ninety-nine million, one hundred fifty-three thousand, forty-two".