2149157898 has 24 divisors (see below), whose sum is σ = 4669713828. Its totient is φ = 714354432.

The previous prime is 2149157893. The next prime is 2149157909. The reversal of 2149157898 is 8987519412.

It is a happy number.

2149157898 is a `hidden beast` number, since 21 + 49 + 1 + 578 + 9 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1960452729 + 188705169 = 44277^2 + 13737^2 .

It is not an unprimeable number, because it can be changed into a prime (2149157893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162765 + ... + 175472.

Almost surely, 2^2149157898 is an apocalyptic number.

2149157898 is an abundant number, since it is smaller than the sum of its proper divisors (2520555930).

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

2149157898 is a wasteful number, since it uses less digits than its factorization.

2149157898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338598 (or 338595 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 2149157898 is about 46359.0109687426. The cubic root of 2149157898 is about 1290.4943517246.

The spelling of 2149157898 in words is "two billion, one hundred forty-nine million, one hundred fifty-seven thousand, eight hundred ninety-eight".