402939 has 6 divisors (see below), whose sum is σ = 582036. Its totient is φ = 268620.

The previous prime is 402923. The next prime is 402943. The reversal of 402939 is 939204.

It is not a de Polignac number, because 402939 - 2⁴ = 402923 is a prime.

It is a super-3 number, since 3×402939³ = 196263331954386057, which contains 333 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402939.

It is not an unprimeable number, because it can be changed into a prime (402949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22377 + ... + 22394.

It is an arithmetic number, because the mean of its divisors is an integer number (97006).

2⁴⁰²⁹³⁹ is an apocalyptic number.

402939 is a deficient number, since it is larger than the sum of its proper divisors (179097).

402939 is a wasteful number, since it uses less digits than its factorization.

402939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44777 (or 44774 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 402939 is about 634.7747632035. The cubic root of 402939 is about 73.8606459438.

The spelling of 402939 in words is "four hundred two thousand, nine hundred thirty-nine".