7525638 has 24 divisors (see below), whose sum is σ = 16415568. Its totient is φ = 2491632.

The previous prime is 7525633. The next prime is 7525657. The reversal of 7525638 is 8365257.

It is a d-powerful number, because it can be written as 7⁸ + 5² + 2¹⁶ + 5⁶ + 6⁸ + 3³ + 8 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7525633) 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 11 ways as a sum of consecutive naturals, for example, 1495 + ... + 4157.

It is an arithmetic number, because the mean of its divisors is an integer number (683982).

Almost surely, 2^7525638 is an apocalyptic number.

7525638 is an abundant number, since it is smaller than the sum of its proper divisors (8889930).

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

7525638 is a wasteful number, since it uses less digits than its factorization.

7525638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828 (or 2825 counting only the distinct ones).

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

The square root of 7525638 is about 2743.2896310816. The cubic root of 7525638 is about 195.9661714490.

The spelling of 7525638 in words is "seven million, five hundred twenty-five thousand, six hundred thirty-eight".