402039 has 24 divisors (see below), whose sum is σ = 658944. Its totient is φ = 234000.

The previous prime is 402037. The next prime is 402043. The reversal of 402039 is 930204.

It is not a de Polignac number, because 402039 - 2¹ = 402037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3004 + ... + 3134.

It is an arithmetic number, because the mean of its divisors is an integer number (27456).

2⁴⁰²⁰³⁹ is an apocalyptic number.

402039 is a deficient number, since it is larger than the sum of its proper divisors (256905).

402039 is a wasteful number, since it uses less digits than its factorization.

402039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 402039 is about 634.0654540345. The cubic root of 402039 is about 73.8056135153.

The spelling of 402039 in words is "four hundred two thousand, thirty-nine".