402197806188 has 24 divisors (see below), whose sum is σ = 1042735053360. Its totient is φ = 134065935360.

The previous prime is 402197806169. The next prime is 402197806189. The reversal of 402197806188 is 881608791204.

402197806188 is a `hidden beast` number, since 4 + 0 + 2 + 19 + 7 + 8 + 0 + 618 + 8 = 666.

It is a super-2 number, since 2×402197806188² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (402197806189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1862026773 + ... + 1862026988.

It is an arithmetic number, because the mean of its divisors is an integer number (43447293890).

Almost surely, 2^402197806188 is an apocalyptic number.

It is an amenable number.

402197806188 is an abundant number, since it is smaller than the sum of its proper divisors (640537247172).

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

402197806188 is a wasteful number, since it uses less digits than its factorization.

402197806188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3724053774 (or 3724053766 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 402197806188 in words is "four hundred two billion, one hundred ninety-seven million, eight hundred six thousand, one hundred eighty-eight".