2057156240 has 20 divisors (see below), whose sum is σ = 4782888444. Its totient is φ = 822862464.

The previous prime is 2057156221. The next prime is 2057156251. The reversal of 2057156240 is 426517502.

It can be written as a sum of positive squares in 2 ways, for example, as 1336341136 + 720815104 = 36556^2 + 26848^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 2057156197 and 2057156206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12857147 + ... + 12857306.

Almost surely, 2^2057156240 is an apocalyptic number.

2057156240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2057156240 is an abundant number, since it is smaller than the sum of its proper divisors (2725732204).

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

2057156240 is a wasteful number, since it uses less digits than its factorization.

2057156240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25714466 (or 25714460 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 2057156240 is about 45355.8842930000. The cubic root of 2057156240 is about 1271.8105574708.

The spelling of 2057156240 in words is "two billion, fifty-seven million, one hundred fifty-six thousand, two hundred forty".