32564440 has 32 divisors (see below), whose sum is σ = 75253680. Its totient is φ = 12673152.

The previous prime is 32564437. The next prime is 32564443. The reversal of 32564440 is 4446523.

It is an interprime number because it is at equal distance from previous prime (32564437) and next prime (32564443).

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 32564399 and 32564408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32564443) 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, 9522 + ... + 12481.

Almost surely, 2^32564440 is an apocalyptic number.

It is an amenable number.

32564440 is an abundant number, since it is smaller than the sum of its proper divisors (42689240).

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

32564440 is a wasteful number, since it uses less digits than its factorization.

32564440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22051 (or 22047 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 32564440 is about 5706.5260886112. The cubic root of 32564440 is about 319.3359929153.

The spelling of 32564440 in words is "thirty-two million, five hundred sixty-four thousand, four hundred forty".