402839136 has 192 divisors, whose sum is σ = 1374912000. Its totient is φ = 112347648.

The previous prime is 402839053. The next prime is 402839147. The reversal of 402839136 is 631938204.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 402839136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259290 + ... + 260838.

It is an arithmetic number, because the mean of its divisors is an integer number (7161000).

Almost surely, 2^402839136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402839136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687456000).

402839136 is an abundant number, since it is smaller than the sum of its proper divisors (972072864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402839136 is a wasteful number, since it uses less digits than its factorization.

402839136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 402839136 is about 20070.8528966758. The cubic root of 402839136 is about 738.5454359006.

The spelling of 402839136 in words is "four hundred two million, eight hundred thirty-nine thousand, one hundred thirty-six".