2278557 has 8 divisors (see below), whose sum is σ = 3375680. Its totient is φ = 1519020.

The previous prime is 2278553. The next prime is 2278631. The reversal of 2278557 is 7558722.

It is not a de Polignac number, because 2278557 - 2² = 2278553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42169 + ... + 42222.

It is an arithmetic number, because the mean of its divisors is an integer number (421960).

2^2278557 is an apocalyptic number.

2278557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2278557 is a deficient number, since it is larger than the sum of its proper divisors (1097123).

2278557 is an equidigital number, since it uses as much as digits as its factorization.

2278557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84400 (or 84394 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 2278557 is about 1509.4889863792. The cubic root of 2278557 is about 131.5891148999.

The spelling of 2278557 in words is "two million, two hundred seventy-eight thousand, five hundred fifty-seven".