187242240 has 72 divisors (see below), whose sum is σ = 598017168. Its totient is φ = 49930240.

The previous prime is 187242239. The next prime is 187242259. The reversal of 187242240 is 42242781.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 187242198 and 187242207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20541 + ... + 28220.

It is an arithmetic number, because the mean of its divisors is an integer number (8305794).

Almost surely, 2^187242240 is an apocalyptic number.

187242240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187242240 is an abundant number, since it is smaller than the sum of its proper divisors (410774928).

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

187242240 is an equidigital number, since it uses as much as digits as its factorization.

187242240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48785 (or 48771 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 187242240 is about 13683.6486362373. The cubic root of 187242240 is about 572.0947240718.

The spelling of 187242240 in words is "one hundred eighty-seven million, two hundred forty-two thousand, two hundred forty".