402399998208 has 432 divisors, whose sum is σ = 1309337213184. Its totient is φ = 117928673280.

The previous prime is 402399998201. The next prime is 402399998233. The reversal of 402399998208 is 802899993204.

402399998208 is a `hidden beast` number, since 402 + 39 + 99 + 98 + 20 + 8 = 666.

It is a super-2 number, since 2×402399998208² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402399998201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181178538 + ... + 181180758.

Almost surely, 2^402399998208 is an apocalyptic number.

402399998208 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402399998208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (654668606592).

402399998208 is an abundant number, since it is smaller than the sum of its proper divisors (906937214976).

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

402399998208 is a wasteful number, since it uses less digits than its factorization.

402399998208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542 (or 2525 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 402399998208 in words is "four hundred two billion, three hundred ninety-nine million, nine hundred ninety-eight thousand, two hundred eight".