2157904190 has 16 divisors (see below), whose sum is σ = 4183014528. Its totient is φ = 796764576.

The previous prime is 2157904171. The next prime is 2157904201. The reversal of 2157904190 is 914097512.

2157904190 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2157904190² = 9313100986439112200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 8299502 + ... + 8299761.

It is an arithmetic number, because the mean of its divisors is an integer number (261438408).

Almost surely, 2^2157904190 is an apocalyptic number.

2157904190 is a deficient number, since it is larger than the sum of its proper divisors (2025110338).

2157904190 is a wasteful number, since it uses less digits than its factorization.

2157904190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16599283.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 2157904190 is about 46453.2473568856. The cubic root of 2157904190 is about 1292.2425967115.

The spelling of 2157904190 in words is "two billion, one hundred fifty-seven million, nine hundred four thousand, one hundred ninety".