2157692278 has 32 divisors (see below), whose sum is σ = 3861633600. Its totient is φ = 884628864.

The previous prime is 2157692233. The next prime is 2157692279. The reversal of 2157692278 is 8722967512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157692279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19876 + ... + 68632.

It is an arithmetic number, because the mean of its divisors is an integer number (120676050).

Almost surely, 2^2157692278 is an apocalyptic number.

2157692278 is a deficient number, since it is larger than the sum of its proper divisors (1703941322).

2157692278 is a wasteful number, since it uses less digits than its factorization.

2157692278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48904.

The product of its digits is 846720, while the sum is 49.

The square root of 2157692278 is about 46450.9663839193. The cubic root of 2157692278 is about 1292.2002947596.

The spelling of 2157692278 in words is "two billion, one hundred fifty-seven million, six hundred ninety-two thousand, two hundred seventy-eight".