2195904402 has 24 divisors (see below), whose sum is σ = 4758699036. Its totient is φ = 731828736.

The previous prime is 2195904367. The next prime is 2195904443. The reversal of 2195904402 is 2044095912.

2195904402 is a `hidden beast` number, since 21 + 9 + 590 + 4 + 40 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2075804721 + 120099681 = 45561^2 + 10959^2 .

It is a super-2 number, since 2×2195904402² = 9643992285445955208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136698 + ... + 151914.

Almost surely, 2^2195904402 is an apocalyptic number.

2195904402 is an abundant number, since it is smaller than the sum of its proper divisors (2562794634).

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

2195904402 is a wasteful number, since it uses less digits than its factorization.

2195904402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23242 (or 23239 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2195904402 is about 46860.4780385348. The cubic root of 2195904402 is about 1299.7838697894.

The spelling of 2195904402 in words is "two billion, one hundred ninety-five million, nine hundred four thousand, four hundred two".