42187320 has 96 divisors (see below), whose sum is σ = 156705120. Its totient is φ = 9642240.

The previous prime is 42187303. The next prime is 42187331. The reversal of 42187320 is 2378124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5851 + ... + 10890.

It is an arithmetic number, because the mean of its divisors is an integer number (1632345).

Almost surely, 2^42187320 is an apocalyptic number.

42187320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42187320 is an abundant number, since it is smaller than the sum of its proper divisors (114517800).

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

42187320 is a wasteful number, since it uses less digits than its factorization.

42187320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16765 (or 16758 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 42187320 is about 6495.1766719620. The cubic root of 42187320 is about 348.1186674174.

The spelling of 42187320 in words is "forty-two million, one hundred eighty-seven thousand, three hundred twenty".