42909084 has 36 divisors (see below), whose sum is σ = 111966400. Its totient is φ = 13841280.

The previous prime is 42909043. The next prime is 42909089. The reversal of 42909084 is 48090924.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42909089) 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, 18109 + ... + 20340.

Almost surely, 2^42909084 is an apocalyptic number.

It is an amenable number.

42909084 is an abundant number, since it is smaller than the sum of its proper divisors (69057316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42909084 is a wasteful number, since it uses less digits than its factorization.

42909084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38490 (or 38485 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 42909084 is about 6550.5025761387. The cubic root of 42909084 is about 350.0927210127.

The spelling of 42909084 in words is "forty-two million, nine hundred nine thousand, eighty-four".