2155868298 has 24 divisors (see below), whose sum is σ = 4844050848. Its totient is φ = 718622604.

The previous prime is 2155868287. The next prime is 2155868321. The reversal of 2155868298 is 8928685512.

It is a happy number.

2155868298 is a `hidden beast` number, since 2 + 1 + 558 + 6 + 82 + 9 + 8 = 666.

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

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, 2217486 + ... + 2218457.

It is an arithmetic number, because the mean of its divisors is an integer number (201835452).

Almost surely, 2^2155868298 is an apocalyptic number.

2155868298 is an abundant number, since it is smaller than the sum of its proper divisors (2688182550).

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

2155868298 is an equidigital number, since it uses as much as digits as its factorization.

2155868298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4435960 (or 4435948 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The square root of 2155868298 is about 46431.3288416345. The cubic root of 2155868298 is about 1291.8360766288.

The spelling of 2155868298 in words is "two billion, one hundred fifty-five million, eight hundred sixty-eight thousand, two hundred ninety-eight".