42090084 has 24 divisors (see below), whose sum is σ = 109122720. Its totient is φ = 14029992.

The previous prime is 42090071. The next prime is 42090091. The reversal of 42090084 is 48009024.

It is a super-2 number, since 2×42090084² = 3543150342254112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 7 ways as a sum of consecutive naturals, for example, 194754 + ... + 194969.

It is an arithmetic number, because the mean of its divisors is an integer number (4546780).

Almost surely, 2^42090084 is an apocalyptic number.

It is an amenable number.

42090084 is an abundant number, since it is smaller than the sum of its proper divisors (67032636).

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

42090084 is a wasteful number, since it uses less digits than its factorization.

42090084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389736 (or 389728 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 42090084 is about 6487.6871071284. The cubic root of 42090084 is about 347.8510063732.

The spelling of 42090084 in words is "forty-two million, ninety thousand, eighty-four".