42187800 has 48 divisors (see below), whose sum is σ = 130784040. Its totient is φ = 11249920.

The previous prime is 42187787. The next prime is 42187813. The reversal of 42187800 is 878124.

It is an interprime number because it is at equal distance from previous prime (42187787) and next prime (42187813).

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 34557 + ... + 35756.

Almost surely, 2^42187800 is an apocalyptic number.

42187800 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42187800 is an abundant number, since it is smaller than the sum of its proper divisors (88596240).

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

42187800 is a wasteful number, since it uses less digits than its factorization.

42187800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70332 (or 70323 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 42187800 is about 6495.2136223530. The cubic root of 42187800 is about 348.1199876904.

The spelling of 42187800 in words is "forty-two million, one hundred eighty-seven thousand, eight hundred".