2257278 has 16 divisors (see below), whose sum is σ = 4538496. Its totient is φ = 748440.

The previous prime is 2257247. The next prime is 2257291. The reversal of 2257278 is 8727522.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (283656).

2^2257278 is an apocalyptic number.

2257278 is an abundant number, since it is smaller than the sum of its proper divisors (2281218).

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

2257278 is a wasteful number, since it uses less digits than its factorization.

2257278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999.

The product of its digits is 15680, while the sum is 33.

The square root of 2257278 is about 1502.4240413412. The cubic root of 2257278 is about 131.1782047252.

It can be divided in two parts, 225 and 7278, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 2257278 in words is "two million, two hundred fifty-seven thousand, two hundred seventy-eight".