2157969402 has 48 divisors (see below), whose sum is σ = 4842059040. Its totient is φ = 693768096.

The previous prime is 2157969391. The next prime is 2157969461. The reversal of 2157969402 is 2049697512.

2157969402 is a `hidden beast` number, since 2 + 157 + 96 + 9 + 402 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 680673 + ... + 683835.

It is an arithmetic number, because the mean of its divisors is an integer number (100876230).

Almost surely, 2^2157969402 is an apocalyptic number.

2157969402 is an abundant number, since it is smaller than the sum of its proper divisors (2684089638).

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

2157969402 is a wasteful number, since it uses less digits than its factorization.

2157969402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507 (or 4504 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 2157969402 is about 46453.9492616075. The cubic root of 2157969402 is about 1292.2556137978.

The spelling of 2157969402 in words is "two billion, one hundred fifty-seven million, nine hundred sixty-nine thousand, four hundred two".