2156760238 has 4 divisors (see below), whose sum is σ = 3235140360. Its totient is φ = 1078380118.

The previous prime is 2156760211. The next prime is 2156760239. The reversal of 2156760238 is 8320676512.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2156760238² = 9303229448435633288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156760238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156760239) 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 as a sum of consecutive naturals, namely, 539190058 + ... + 539190061.

It is an arithmetic number, because the mean of its divisors is an integer number (808785090).

Almost surely, 2^2156760238 is an apocalyptic number.

2156760238 is a deficient number, since it is larger than the sum of its proper divisors (1078380122).

2156760238 is a wasteful number, since it uses less digits than its factorization.

2156760238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078380121.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 2156760238 is about 46440.9327856364. The cubic root of 2156760238 is about 1292.0142077022.

The spelling of 2156760238 in words is "two billion, one hundred fifty-six million, seven hundred sixty thousand, two hundred thirty-eight".