32445681 has 8 divisors (see below), whose sum is σ = 43466784. Its totient is φ = 21527520.

The previous prime is 32445671. The next prime is 32445683. The reversal of 32445681 is 18654423.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 32445681 - 2¹⁴ = 32429297 is a prime.

It is a super-2 number, since 2×32445681² = 2105444431107522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (32445683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24996 + ... + 26261.

It is an arithmetic number, because the mean of its divisors is an integer number (5433348).

Almost surely, 2^32445681 is an apocalyptic number.

It is an amenable number.

32445681 is a deficient number, since it is larger than the sum of its proper divisors (11021103).

32445681 is a wasteful number, since it uses less digits than its factorization.

32445681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51471.

The product of its digits is 23040, while the sum is 33.

The square root of 32445681 is about 5696.1110417547. Note that the first 3 decimals coincide. The cubic root of 32445681 is about 318.9473254156.

The spelling of 32445681 in words is "thirty-two million, four hundred forty-five thousand, six hundred eighty-one".