399160842 has 16 divisors (see below), whose sum is σ = 811853280. Its totient is φ = 130798352.

The previous prime is 399160823. The next prime is 399160877. The reversal of 399160842 is 248061993.

It is a super-2 number, since 2×399160842² = 318658755572297928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 399160794 and 399160803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563433 + ... + 564140.

It is an arithmetic number, because the mean of its divisors is an integer number (50740830).

Almost surely, 2^399160842 is an apocalyptic number.

399160842 is an abundant number, since it is smaller than the sum of its proper divisors (412692438).

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

399160842 is a wasteful number, since it uses less digits than its factorization.

399160842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127637.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 399160842 is about 19979.0100355348. The cubic root of 399160842 is about 736.2906915785.

The spelling of 399160842 in words is "three hundred ninety-nine million, one hundred sixty thousand, eight hundred forty-two".