2758864 has 20 divisors (see below), whose sum is σ = 5373540. Its totient is φ = 1372160.

The previous prime is 2758843. The next prime is 2758871. The reversal of 2758864 is 4688572.

It can be written as a sum of positive squares in 2 ways, for example, as 1299600 + 1459264 = 1140^2 + 1208^2 .

It is a super-2 number, since 2×2758864² = 15222661140992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984 + ... + 4624.

It is an arithmetic number, because the mean of its divisors is an integer number (268677).

2^2758864 is an apocalyptic number.

It is an amenable number.

2758864 is a deficient number, since it is larger than the sum of its proper divisors (2614676).

2758864 is a wasteful number, since it uses less digits than its factorization.

2758864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 912 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 2758864 is about 1660.9828415730. The cubic root of 2758864 is about 140.2523340391.

The spelling of 2758864 in words is "two million, seven hundred fifty-eight thousand, eight hundred sixty-four".