2564278 has 8 divisors (see below), whose sum is σ = 4048920. Its totient is φ = 1214640.

The previous prime is 2564251. The next prime is 2564279. The reversal of 2564278 is 8724652.

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

It is a super-2 number, since 2×2564278² = 13151043322568, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33703 + ... + 33778.

It is an arithmetic number, because the mean of its divisors is an integer number (506115).

2^2564278 is an apocalyptic number.

2564278 is a deficient number, since it is larger than the sum of its proper divisors (1484642).

2564278 is a wasteful number, since it uses less digits than its factorization.

2564278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67502.

The product of its digits is 26880, while the sum is 34.

The square root of 2564278 is about 1601.3363169553. The cubic root of 2564278 is about 136.8742341304.

The spelling of 2564278 in words is "two million, five hundred sixty-four thousand, two hundred seventy-eight".