402340239 has 24 divisors (see below), whose sum is σ = 665505152. Its totient is φ = 229450320.

The previous prime is 402340231. The next prime is 402340243. The reversal of 402340239 is 932043204.

It is a happy number.

It is not a de Polignac number, because 402340239 - 2³ = 402340231 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402340231) 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, 26844 + ... + 39054.

Almost surely, 2^402340239 is an apocalyptic number.

402340239 is a deficient number, since it is larger than the sum of its proper divisors (263164913).

402340239 is a wasteful number, since it uses less digits than its factorization.

402340239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12747 (or 12744 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 402340239 is about 20058.4206506893. The cubic root of 402340239 is about 738.2404255545.

The spelling of 402340239 in words is "four hundred two million, three hundred forty thousand, two hundred thirty-nine".