2500864 has 18 divisors (see below), whose sum is σ = 4992470. Its totient is φ = 1250304.

The previous prime is 2500847. The next prime is 2500879. The reversal of 2500864 is 4680052.

It can be written as a sum of positive squares in only one way, i.e., 1982464 + 518400 = 1408^2 + 720^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4629 + ... + 5140.

2^2500864 is an apocalyptic number.

It is an amenable number.

2500864 is a deficient number, since it is larger than the sum of its proper divisors (2491606).

2500864 is an frugal number, since it uses more digits than its factorization.

2500864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9785 (or 9771 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2500864 is about 1581.4120272718. The cubic root of 2500864 is about 135.7365140744.

It can be divided in two parts, 2500 and 864, that added together give a square (3364 = 58²).

The spelling of 2500864 in words is "two million, five hundred thousand, eight hundred sixty-four".