7256538 has 12 divisors (see below), whose sum is σ = 15722538. Its totient is φ = 2418840.

The previous prime is 7256533. The next prime is 7256539. The reversal of 7256538 is 8356527.

7256538 is a `hidden beast` number, since 72 + 56 + 538 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4524129 + 2732409 = 2127^2 + 1653^2 .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (7256531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201553 + ... + 201588.

Almost surely, 2^7256538 is an apocalyptic number.

7256538 is an abundant number, since it is smaller than the sum of its proper divisors (8466000).

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

7256538 is a wasteful number, since it uses less digits than its factorization.

7256538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403149 (or 403146 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 7256538 is about 2693.7962061002. The cubic root of 7256538 is about 193.6019933827.

The spelling of 7256538 in words is "seven million, two hundred fifty-six thousand, five hundred thirty-eight".