32440645 has 4 divisors (see below), whose sum is σ = 38928780. Its totient is φ = 25952512.

The previous prime is 32440643. The next prime is 32440651. The reversal of 32440645 is 54604423.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22410756 + 10029889 = 4734^2 + 3167^2 .

It is a cyclic number.

It is not a de Polignac number, because 32440645 - 2¹ = 32440643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32440643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3244060 + ... + 3244069.

It is an arithmetic number, because the mean of its divisors is an integer number (9732195).

Almost surely, 2^32440645 is an apocalyptic number.

It is an amenable number.

32440645 is a deficient number, since it is larger than the sum of its proper divisors (6488135).

32440645 is an equidigital number, since it uses as much as digits as its factorization.

32440645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6488134.

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

The square root of 32440645 is about 5695.6689686111. The cubic root of 32440645 is about 318.9308229434.

The spelling of 32440645 in words is "thirty-two million, four hundred forty thousand, six hundred forty-five".