32403989 has 4 divisors (see below), whose sum is σ = 34310124. Its totient is φ = 30497856.

The previous prime is 32403961. The next prime is 32403997. The reversal of 32403989 is 98930423.

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 24423364 + 7980625 = 4942^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 32403989 - 2²⁰ = 31355413 is a prime.

It is a super-2 number, since 2×32403989² = 2100037006224242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32403919) 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, 953042 + ... + 953075.

It is an arithmetic number, because the mean of its divisors is an integer number (8577531).

Almost surely, 2^32403989 is an apocalyptic number.

It is an amenable number.

32403989 is a deficient number, since it is larger than the sum of its proper divisors (1906135).

32403989 is a wasteful number, since it uses less digits than its factorization.

32403989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906134.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 32403989 is about 5692.4501754517. The cubic root of 32403989 is about 318.8106533816.

The spelling of 32403989 in words is "thirty-two million, four hundred three thousand, nine hundred eighty-nine".