2258640 has 60 divisors (see below), whose sum is σ = 7587684. Its totient is φ = 602112.

The previous prime is 2258639. The next prime is 2258651. The reversal of 2258640 is 468522.

It can be written as a sum of positive squares in 2 ways, for example, as 1774224 + 484416 = 1332^2 + 696^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 849 + ... + 2288.

2^2258640 is an apocalyptic number.

2258640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2258640 is an abundant number, since it is smaller than the sum of its proper divisors (5329044).

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

2258640 is a wasteful number, since it uses less digits than its factorization.

2258640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156 (or 3147 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2258640 is about 1502.8772404957. The cubic root of 2258640 is about 131.2045829254.

The spelling of 2258640 in words is "two million, two hundred fifty-eight thousand, six hundred forty".