402108444738 has 192 divisors, whose sum is σ = 1171434700800. Its totient is φ = 96272426880.

The previous prime is 402108444721. The next prime is 402108444739. The reversal of 402108444738 is 837444801204.

It is a super-2 number, since 2×402108444738² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402108444693 and 402108444702.

It is not an unprimeable number, because it can be changed into a prime (402108444739) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12939423 + ... + 12970461.

It is an arithmetic number, because the mean of its divisors is an integer number (6101222400).

Almost surely, 2^402108444738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402108444738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585717350400).

402108444738 is an abundant number, since it is smaller than the sum of its proper divisors (769326256062).

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

402108444738 is a wasteful number, since it uses less digits than its factorization.

402108444738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31797 (or 31794 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 45.

The spelling of 402108444738 in words is "four hundred two billion, one hundred eight million, four hundred forty-four thousand, seven hundred thirty-eight".