7256646 has 24 divisors (see below), whose sum is σ = 15991560. Its totient is φ = 2377536.

The previous prime is 7256629. The next prime is 7256657. The reversal of 7256646 is 6466527.

7256646 is a `hidden beast` number, since 7 + 2 + 5 + 6 + 646 = 666.

It is a super-2 number, since 2×7256646² = 105317822338632, which contains 22 as substring.

It is a d-powerful number, because it can be written as 7⁴ + 2⁷ + 5⁹ + 6⁸ + 6⁸ + 4⁹ + 6⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 7256646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2355 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (666315).

Almost surely, 2^7256646 is an apocalyptic number.

7256646 is an abundant number, since it is smaller than the sum of its proper divisors (8734914).

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

7256646 is a wasteful number, since it uses less digits than its factorization.

7256646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900 (or 6897 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 7256646 is about 2693.8162520855. The cubic root of 7256646 is about 193.6029538458.

The spelling of 7256646 in words is "seven million, two hundred fifty-six thousand, six hundred forty-six".