402224231988 has 72 divisors (see below), whose sum is σ = 1031779607040. Its totient is φ = 132093299520.

The previous prime is 402224231971. The next prime is 402224231989. The reversal of 402224231988 is 889132422204.

402224231988 is a `hidden beast` number, since 402 + 2 + 2 + 4 + 231 + 9 + 8 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402224231989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3623406 + ... + 3732762.

It is an arithmetic number, because the mean of its divisors is an integer number (14330272320).

Almost surely, 2^402224231988 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 402224231988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515889803520).

402224231988 is an abundant number, since it is smaller than the sum of its proper divisors (629555375052).

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

402224231988 is a wasteful number, since it uses less digits than its factorization.

402224231988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110877 (or 110872 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 402224231988 in words is "four hundred two billion, two hundred twenty-four million, two hundred thirty-one thousand, nine hundred eighty-eight".