2056940391 has 32 divisors (see below), whose sum is σ = 3102624000. Its totient is φ = 1200711680.

The previous prime is 2056940341. The next prime is 2056940443. The reversal of 2056940391 is 1930496502.

It is a cyclic number.

It is not a de Polignac number, because 2056940391 - 2¹¹ = 2056938343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056940341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427300 + ... + 432086.

It is an arithmetic number, because the mean of its divisors is an integer number (96957000).

Almost surely, 2^2056940391 is an apocalyptic number.

2056940391 is a deficient number, since it is larger than the sum of its proper divisors (1045683609).

2056940391 is a wasteful number, since it uses less digits than its factorization.

2056940391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5279.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 2056940391 is about 45353.5047267573. The cubic root of 2056940391 is about 1271.7660739529.

The spelling of 2056940391 in words is "two billion, fifty-six million, nine hundred forty thousand, three hundred ninety-one".