42809432 has 16 divisors (see below), whose sum is σ = 84492600. Its totient is φ = 20278080.

The previous prime is 42809363. The next prime is 42809471. The reversal of 42809432 is 23490824.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140669 + ... + 140972.

Almost surely, 2^42809432 is an apocalyptic number.

It is an amenable number.

42809432 is a deficient number, since it is larger than the sum of its proper divisors (41683168).

42809432 is a wasteful number, since it uses less digits than its factorization.

42809432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281666 (or 281662 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 42809432 is about 6542.8917154420. The cubic root of 42809432 is about 349.8214926464.

The spelling of 42809432 in words is "forty-two million, eight hundred nine thousand, four hundred thirty-two".