40140188 has 24 divisors (see below), whose sum is σ = 76809600. Its totient is φ = 18203120.

The previous prime is 40140187. The next prime is 40140193. The reversal of 40140188 is 88104104.

It is a super-2 number, since 2×40140188² = 3222469385350688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25595 + ... + 27117.

It is an arithmetic number, because the mean of its divisors is an integer number (3200400).

Almost surely, 2^40140188 is an apocalyptic number.

It is an amenable number.

40140188 is a deficient number, since it is larger than the sum of its proper divisors (36669412).

40140188 is a wasteful number, since it uses less digits than its factorization.

40140188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137 (or 2135 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 40140188 is about 6335.6284613288. The cubic root of 40140188 is about 342.3942536775.

The spelling of 40140188 in words is "forty million, one hundred forty thousand, one hundred eighty-eight".