42732909 has 12 divisors (see below), whose sum is σ = 62171200. Its totient is φ = 28282824.

The previous prime is 42732901. The next prime is 42732929. The reversal of 42732909 is 90923724.

It is not a de Polignac number, because 42732909 - 2³ = 42732901 is a prime.

It is a super-2 number, since 2×42732909² = 3652203023204562, 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 (42732901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15829 + ... + 18330.

Almost surely, 2^42732909 is an apocalyptic number.

It is an amenable number.

42732909 is a deficient number, since it is larger than the sum of its proper divisors (19438291).

42732909 is a wasteful number, since it uses less digits than its factorization.

42732909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34304 (or 34301 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 42732909 is about 6537.0413032197. The cubic root of 42732909 is about 349.6129299145.

The spelling of 42732909 in words is "forty-two million, seven hundred thirty-two thousand, nine hundred nine".