2840557 has 4 divisors (see below), whose sum is σ = 2990080. Its totient is φ = 2691036.

The previous prime is 2840549. The next prime is 2840627. The reversal of 2840557 is 7550482.

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 2840557 - 2³ = 2840549 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 (2840507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74733 + ... + 74770.

It is an arithmetic number, because the mean of its divisors is an integer number (747520).

2^2840557 is an apocalyptic number.

It is an amenable number.

2840557 is a deficient number, since it is larger than the sum of its proper divisors (149523).

2840557 is a wasteful number, since it uses less digits than its factorization.

2840557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149522.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 2840557 is about 1685.3952058790. The cubic root of 2840557 is about 141.6232325132.

The spelling of 2840557 in words is "two million, eight hundred forty thousand, five hundred fifty-seven".