399889039 has 8 divisors (see below), whose sum is σ = 436414032. Its totient is φ = 363392640.

The previous prime is 399889027. The next prime is 399889069. The reversal of 399889039 is 930988993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399889039 - 2¹⁵ = 399856271 is a prime.

It is a super-2 number, since 2×399889039² = 319822487024687042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399889069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30957 + ... + 41929.

It is an arithmetic number, because the mean of its divisors is an integer number (54551754).

Almost surely, 2^399889039 is an apocalyptic number.

399889039 is a deficient number, since it is larger than the sum of its proper divisors (36524993).

399889039 is a wasteful number, since it uses less digits than its factorization.

399889039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14297.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The square root of 399889039 is about 19997.2257825929. The cubic root of 399889039 is about 736.7381627907.

The spelling of 399889039 in words is "three hundred ninety-nine million, eight hundred eighty-nine thousand, thirty-nine".