32640433 has 4 divisors (see below), whose sum is σ = 37303360. Its totient is φ = 27977508.

The previous prime is 32640431. The next prime is 32640437. The reversal of 32640433 is 33404623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32640433 - 2¹ = 32640431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32640398 and 32640407.

It is not an unprimeable number, because it can be changed into a prime (32640431) 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 3 ways as a sum of consecutive naturals, for example, 2331453 + ... + 2331466.

It is an arithmetic number, because the mean of its divisors is an integer number (9325840).

Almost surely, 2^32640433 is an apocalyptic number.

It is an amenable number.

32640433 is a deficient number, since it is larger than the sum of its proper divisors (4662927).

32640433 is an equidigital number, since it uses as much as digits as its factorization.

32640433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662926.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 32640433 is about 5713.1806377884. The cubic root of 32640433 is about 319.5842027997.

The spelling of 32640433 in words is "thirty-two million, six hundred forty thousand, four hundred thirty-three".