402113021442 has 128 divisors (see below), whose sum is σ = 897968332800. Its totient is φ = 119024640000.

The previous prime is 402113021423. The next prime is 402113021449. The reversal of 402113021442 is 244120311204.

It is not an unprimeable number, because it can be changed into a prime (402113021449) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 326654967 + ... + 326656197.

It is an arithmetic number, because the mean of its divisors is an integer number (7015377600).

Almost surely, 2^402113021442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402113021442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448984166400).

402113021442 is an abundant number, since it is smaller than the sum of its proper divisors (495855311358).

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

402113021442 is a wasteful number, since it uses less digits than its factorization.

402113021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 402113021442 its reverse (244120311204), we get a palindrome (646233332646).

The spelling of 402113021442 in words is "four hundred two billion, one hundred thirteen million, twenty-one thousand, four hundred forty-two".