2564378 has 8 divisors (see below), whose sum is σ = 3900960. Its totient is φ = 1264060.

The previous prime is 2564369. The next prime is 2564381. The reversal of 2564378 is 8734652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 8888 + ... + 9171.

It is an arithmetic number, because the mean of its divisors is an integer number (487620).

2^2564378 is an apocalyptic number.

2564378 is a deficient number, since it is larger than the sum of its proper divisors (1336582).

2564378 is a wasteful number, since it uses less digits than its factorization.

2564378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18132.

The product of its digits is 40320, while the sum is 35.

The square root of 2564378 is about 1601.3675405727. The cubic root of 2564378 is about 136.8760133506.

The spelling of 2564378 in words is "two million, five hundred sixty-four thousand, three hundred seventy-eight".