7253638 has 16 divisors (see below), whose sum is σ = 12739104. Its totient is φ = 3032640.

The previous prime is 7253599. The next prime is 7253639. The reversal of 7253638 is 8363527.

It is an Ulam number.

It is a d-powerful number, because it can be written as 7⁸ + 2²⁰ + 5⁸ + 3⁶ + 6⁶ + 3⁷ + 8² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7253639) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5745 + ... + 6892.

It is an arithmetic number, because the mean of its divisors is an integer number (796194).

Almost surely, 2^7253638 is an apocalyptic number.

7253638 is a deficient number, since it is larger than the sum of its proper divisors (5485466).

7253638 is a wasteful number, since it uses less digits than its factorization.

7253638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12687.

The product of its digits is 30240, while the sum is 34.

The square root of 7253638 is about 2693.2578784810. The cubic root of 7253638 is about 193.5761996048.

The spelling of 7253638 in words is "seven million, two hundred fifty-three thousand, six hundred thirty-eight".