2557930 has 16 divisors (see below), whose sum is σ = 4628520. Its totient is φ = 1017792.

The previous prime is 2557909. The next prime is 2557931. The reversal of 2557930 is 397552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1990921 + 567009 = 1411^2 + 753^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2557892 and 2557901.

It is not an unprimeable number, because it can be changed into a prime (2557931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732 + ... + 2848.

2^2557930 is an apocalyptic number.

2557930 is a deficient number, since it is larger than the sum of its proper divisors (2070590).

2557930 is a wasteful number, since it uses less digits than its factorization.

2557930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 2557930 is about 1599.3529941823. The cubic root of 2557930 is about 136.7611944353.

The spelling of 2557930 in words is "two million, five hundred fifty-seven thousand, nine hundred thirty".