40032989 has 4 divisors (see below), whose sum is σ = 40045824. Its totient is φ = 40020156.

The previous prime is 40032983. The next prime is 40032991. The reversal of 40032989 is 98923004.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40032989 - 2²⁴ = 23255773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40032983) 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, 1604 + ... + 9090.

It is an arithmetic number, because the mean of its divisors is an integer number (10011456).

Almost surely, 2^40032989 is an apocalyptic number.

It is an amenable number.

40032989 is a deficient number, since it is larger than the sum of its proper divisors (12835).

40032989 is an equidigital number, since it uses as much as digits as its factorization.

40032989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12834.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 40032989 is about 6327.1627922790. The cubic root of 40032989 is about 342.0891808285.

The spelling of 40032989 in words is "forty million, thirty-two thousand, nine hundred eighty-nine".