7531636 has 24 divisors (see below), whose sum is σ = 15550976. Its totient is φ = 3123360.

The previous prime is 7531597. The next prime is 7531637. The reversal of 7531636 is 6361357.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7531598 and 7531607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7531637) 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, 3471 + ... + 5206.

Almost surely, 2^7531636 is an apocalyptic number.

7531636 is the 1736-th heptagonal number.

It is an amenable number.

7531636 is an abundant number, since it is smaller than the sum of its proper divisors (8019340).

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

7531636 is a wasteful number, since it uses less digits than its factorization.

7531636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8719 (or 8717 counting only the distinct ones).

The product of its digits is 11340, while the sum is 31.

The square root of 7531636 is about 2744.3826263843. The cubic root of 7531636 is about 196.0182198806.

The spelling of 7531636 in words is "seven million, five hundred thirty-one thousand, six hundred thirty-six".