2138870375 has 16 divisors (see below), whose sum is σ = 2809803360. Its totient is φ = 1621036800.

The previous prime is 2138870347. The next prime is 2138870399. The reversal of 2138870375 is 5730788312.

It is not a de Polignac number, because 2138870375 - 2⁶ = 2138870311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447914 + ... + 452663.

It is an arithmetic number, because the mean of its divisors is an integer number (175612710).

Almost surely, 2^2138870375 is an apocalyptic number.

2138870375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2138870375 is a deficient number, since it is larger than the sum of its proper divisors (670932985).

2138870375 is an equidigital number, since it uses as much as digits as its factorization.

2138870375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900611 (or 900601 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 2138870375 is about 46247.9229263326. The cubic root of 2138870375 is about 1288.4319579091.

The spelling of 2138870375 in words is "two billion, one hundred thirty-eight million, eight hundred seventy thousand, three hundred seventy-five".