2564780 has 12 divisors (see below), whose sum is σ = 5386080. Its totient is φ = 1025904.

The previous prime is 2564759. The next prime is 2564813. The reversal of 2564780 is 874652.

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

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, 64100 + ... + 64139.

It is an arithmetic number, because the mean of its divisors is an integer number (448840).

2^2564780 is an apocalyptic number.

2564780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2564780 is an abundant number, since it is smaller than the sum of its proper divisors (2821300).

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

2564780 is a wasteful number, since it uses less digits than its factorization.

2564780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128248 (or 128246 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2564780 is about 1601.4930533724. The cubic root of 2564780 is about 136.8831653490.

The spelling of 2564780 in words is "two million, five hundred sixty-four thousand, seven hundred eighty".