40187800 has 48 divisors (see below), whose sum is σ = 95630040. Its totient is φ = 15697920.

The previous prime is 40187789. The next prime is 40187801. The reversal of 40187800 is 878104.

40187800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40187801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6264 + ... + 10936.

Almost surely, 2^40187800 is an apocalyptic number.

40187800 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40187800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47815020).

40187800 is an abundant number, since it is smaller than the sum of its proper divisors (55442240).

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

40187800 is a wasteful number, since it uses less digits than its factorization.

40187800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732 (or 4723 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 40187800 is about 6339.3848281990. The cubic root of 40187800 is about 342.5295763615.

The spelling of 40187800 in words is "forty million, one hundred eighty-seven thousand, eight hundred".