42184872 has 48 divisors (see below), whose sum is σ = 115401780. Its totient is φ = 13920000.

The previous prime is 42184867. The next prime is 42184927. The reversal of 42184872 is 27848124.

It can be written as a sum of positive squares in 2 ways, for example, as 27941796 + 14243076 = 5286^2 + 3774^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4372 + ... + 10172.

Almost surely, 2^42184872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42184872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57700890).

42184872 is an abundant number, since it is smaller than the sum of its proper divisors (73216908).

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

42184872 is a wasteful number, since it uses less digits than its factorization.

42184872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5914 (or 5907 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 42184872 is about 6494.9882216983. The cubic root of 42184872 is about 348.1119338698. Note that the first 3 decimals are identical.

The spelling of 42184872 in words is "forty-two million, one hundred eighty-four thousand, eight hundred seventy-two".