40187880 has 128 divisors (see below), whose sum is σ = 135475200. Its totient is φ = 10596096.

The previous prime is 40187879. The next prime is 40187891. The reversal of 40187880 is 8878104.

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 31 ways as a sum of consecutive naturals, for example, 137014 + ... + 137306.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^40187880 is an apocalyptic number.

40187880 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 40187880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67737600).

40187880 is an abundant number, since it is smaller than the sum of its proper divisors (95287320).

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

40187880 is a wasteful number, since it uses less digits than its factorization.

40187880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 40187880 is about 6339.3911379564. The cubic root of 40187880 is about 342.5298036473.

The spelling of 40187880 in words is "forty million, one hundred eighty-seven thousand, eight hundred eighty".