2157042858 has 16 divisors (see below), whose sum is σ = 4567855680. Its totient is φ = 676719296.

The previous prime is 2157042857. The next prime is 2157042869. The reversal of 2157042858 is 8582407512.

It is not an unprimeable number, because it can be changed into a prime (2157042857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10573638 + ... + 10573841.

It is an arithmetic number, because the mean of its divisors is an integer number (285490980).

Almost surely, 2^2157042858 is an apocalyptic number.

2157042858 is an abundant number, since it is smaller than the sum of its proper divisors (2410812822).

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

2157042858 is a wasteful number, since it uses less digits than its factorization.

2157042858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21147501.

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 2157042858 is about 46443.9754758354. The cubic root of 2157042858 is about 1292.0706400462.

The spelling of 2157042858 in words is "two billion, one hundred fifty-seven million, forty-two thousand, eight hundred fifty-eight".