402048639 has 6 divisors (see below), whose sum is σ = 580736936. Its totient is φ = 268032420.

The previous prime is 402048631. The next prime is 402048643. The reversal of 402048639 is 936840204.

It is a happy number.

It is not a de Polignac number, because 402048639 - 2³ = 402048631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402048631) 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, 22336027 + ... + 22336044.

Almost surely, 2^402048639 is an apocalyptic number.

402048639 is a deficient number, since it is larger than the sum of its proper divisors (178688297).

402048639 is a wasteful number, since it uses less digits than its factorization.

402048639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44672077 (or 44672074 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 402048639 is about 20051.1505654912. The cubic root of 402048639 is about 738.0620334750.

The spelling of 402048639 in words is "four hundred two million, forty-eight thousand, six hundred thirty-nine".