2257644 has 12 divisors (see below), whose sum is σ = 5267864. Its totient is φ = 752544.

The previous prime is 2257643. The next prime is 2257649. The reversal of 2257644 is 4467522.

2257644 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a d-powerful number, because it can be written as 2¹³ + 2¹³ + 5⁹ + 7 + 6⁷ + 4⁶ + 4⁶ .

It is not an unprimeable number, because it can be changed into a prime (2257643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94057 + ... + 94080.

2^2257644 is an apocalyptic number.

It is an amenable number.

2257644 is an abundant number, since it is smaller than the sum of its proper divisors (3010220).

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

2257644 is a wasteful number, since it uses less digits than its factorization.

2257644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188144 (or 188142 counting only the distinct ones).

The product of its digits is 13440, while the sum is 30.

The square root of 2257644 is about 1502.5458395670. The cubic root of 2257644 is about 131.1852941826.

The spelling of 2257644 in words is "two million, two hundred fifty-seven thousand, six hundred forty-four".