2257646 has 4 divisors (see below), whose sum is σ = 3386472. Its totient is φ = 1128822.

The previous prime is 2257643. The next prime is 2257649. The reversal of 2257646 is 6467522.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2257643) and next prime (2257649).

It is a super-2 number, since 2×2257646² = 10193930922632, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2³ + 2¹⁵ + 5⁵ + 7² + 6⁷ + 4⁹ + 6⁸ .

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564410 + ... + 564413.

It is an arithmetic number, because the mean of its divisors is an integer number (846618).

2^2257646 is an apocalyptic number.

2257646 is a deficient number, since it is larger than the sum of its proper divisors (1128826).

2257646 is a wasteful number, since it uses less digits than its factorization.

2257646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128825.

The product of its digits is 20160, while the sum is 32.

The square root of 2257646 is about 1502.5465051039. The cubic root of 2257646 is about 131.1853329207.

It can be divided in two parts, 22576 and 46, that added together give a palindrome (22622).

The spelling of 2257646 in words is "two million, two hundred fifty-seven thousand, six hundred forty-six".