2157868600 has 24 divisors (see below), whose sum is σ = 5017044960. Its totient is φ = 863147360.

The previous prime is 2157868597. The next prime is 2157868607. The reversal of 2157868600 is 68687512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157868607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5394472 + ... + 5394871.

It is an arithmetic number, because the mean of its divisors is an integer number (209043540).

Almost surely, 2^2157868600 is an apocalyptic number.

2157868600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2157868600 is an abundant number, since it is smaller than the sum of its proper divisors (2859176360).

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

2157868600 is a wasteful number, since it uses less digits than its factorization.

2157868600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10789359 (or 10789350 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 2157868600 is about 46452.8642819794. The cubic root of 2157868600 is about 1292.2354924160.

The spelling of 2157868600 in words is "two billion, one hundred fifty-seven million, eight hundred sixty-eight thousand, six hundred".