7522644 has 12 divisors (see below), whose sum is σ = 17552864. Its totient is φ = 2507544.

The previous prime is 7522643. The next prime is 7522741. The reversal of 7522644 is 4462257.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a d-powerful number, because it can be written as 7⁸ + 5⁷ + 2 + 2⁵ + 6⁸ + 4 + 4³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7522643) 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 3 ways as a sum of consecutive naturals, for example, 313432 + ... + 313455.

Almost surely, 2^7522644 is an apocalyptic number.

It is an amenable number.

7522644 is an abundant number, since it is smaller than the sum of its proper divisors (10030220).

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

7522644 is a wasteful number, since it uses less digits than its factorization.

7522644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626894 (or 626892 counting only the distinct ones).

The product of its digits is 13440, while the sum is 30.

The square root of 7522644 is about 2742.7438815901. The cubic root of 7522644 is about 195.9401802731.

The spelling of 7522644 in words is "seven million, five hundred twenty-two thousand, six hundred forty-four".