40099188 has 12 divisors (see below), whose sum is σ = 93564800. Its totient is φ = 13366392.

The previous prime is 40099187. The next prime is 40099193. The reversal of 40099188 is 88199004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40099187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670788 + ... + 1670811.

Almost surely, 2^40099188 is an apocalyptic number.

It is an amenable number.

40099188 is an abundant number, since it is smaller than the sum of its proper divisors (53465612).

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

40099188 is a wasteful number, since it uses less digits than its factorization.

40099188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341606 (or 3341604 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 40099188 is about 6332.3919651266. The cubic root of 40099188 is about 342.2776378250.

The spelling of 40099188 in words is "forty million, ninety-nine thousand, one hundred eighty-eight".