2740400557 has 4 divisors (see below), whose sum is σ = 2742146496. Its totient is φ = 2738654620.

The previous prime is 2740400549. The next prime is 2740400581. The reversal of 2740400557 is 7550040472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2740400557 - 2³ = 2740400549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2740409557) by changing a digit.

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, 870613 + ... + 873754.

It is an arithmetic number, because the mean of its divisors is an integer number (685536624).

Almost surely, 2^2740400557 is an apocalyptic number.

It is an amenable number.

2740400557 is a deficient number, since it is larger than the sum of its proper divisors (1745939).

2740400557 is a wasteful number, since it uses less digits than its factorization.

2740400557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745938.

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 2740400557 is about 52348.8352974543. The cubic root of 2740400557 is about 1399.3875819720.

The spelling of 2740400557 in words is "two billion, seven hundred forty million, four hundred thousand, five hundred fifty-seven".