2557616 has 20 divisors (see below), whose sum is σ = 5247432. Its totient is φ = 1203456.

The previous prime is 2557613. The next prime is 2557631. The reversal of 2557616 is 6167552.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2557613) 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, 4430 + ... + 4973.

2^2557616 is an apocalyptic number.

It is an amenable number.

2557616 is an abundant number, since it is smaller than the sum of its proper divisors (2689816).

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

2557616 is a wasteful number, since it uses less digits than its factorization.

2557616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9428 (or 9422 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 2557616 is about 1599.2548264739. The cubic root of 2557616 is about 136.7555981430.

The spelling of 2557616 in words is "two million, five hundred fifty-seven thousand, six hundred sixteen".