42809684 has 24 divisors (see below), whose sum is σ = 78274560. Its totient is φ = 20460384.

The previous prime is 42809681. The next prime is 42809687. The reversal of 42809684 is 48690824.

It is an interprime number because it is at equal distance from previous prime (42809681) and next prime (42809687).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42809681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10157 + ... + 13739.

It is an arithmetic number, because the mean of its divisors is an integer number (3261440).

Almost surely, 2^42809684 is an apocalyptic number.

It is an amenable number.

42809684 is a deficient number, since it is larger than the sum of its proper divisors (35464876).

42809684 is a wasteful number, since it uses less digits than its factorization.

42809684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719 (or 3717 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 42809684 is about 6542.9109729539. The cubic root of 42809684 is about 349.8221790594.

The spelling of 42809684 in words is "forty-two million, eight hundred nine thousand, six hundred eighty-four".