42217084 has 24 divisors (see below), whose sum is σ = 90929888. Its totient is φ = 16701120.

The previous prime is 42217081. The next prime is 42217157. The reversal of 42217084 is 48071224.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42217081) 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, 57627 + ... + 58354.

Almost surely, 2^42217084 is an apocalyptic number.

It is an amenable number.

42217084 is an abundant number, since it is smaller than the sum of its proper divisors (48712804).

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

42217084 is a wasteful number, since it uses less digits than its factorization.

42217084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116005 (or 116003 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 42217084 is about 6497.4675066521. The cubic root of 42217084 is about 348.2005164047.

The spelling of 42217084 in words is "forty-two million, two hundred seventeen thousand, eighty-four".