32440993 has 4 divisors (see below), whose sum is σ = 34936468. Its totient is φ = 29945520.

The previous prime is 32440987. The next prime is 32441011. The reversal of 32440993 is 39904423.

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 2934369 + 29506624 = 1713^2 + 5432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32440993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32440193) 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, 1247718 + ... + 1247743.

It is an arithmetic number, because the mean of its divisors is an integer number (8734117).

Almost surely, 2^32440993 is an apocalyptic number.

It is an amenable number.

32440993 is a deficient number, since it is larger than the sum of its proper divisors (2495475).

32440993 is a wasteful number, since it uses less digits than its factorization.

32440993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495474.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 32440993 is about 5695.6995180575. The cubic root of 32440993 is about 318.9319633598.

It can be divided in two parts, 32440 and 993, that added together give a palindrome (33433).

The spelling of 32440993 in words is "thirty-two million, four hundred forty thousand, nine hundred ninety-three".