40195818 has 32 divisors (see below), whose sum is σ = 96196800. Its totient is φ = 12367728.

The previous prime is 40195781. The next prime is 40195819. The reversal of 40195818 is 81859104.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40195819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27928 + ... + 29331.

It is an arithmetic number, because the mean of its divisors is an integer number (3006150).

Almost surely, 2^40195818 is an apocalyptic number.

40195818 is an abundant number, since it is smaller than the sum of its proper divisors (56000982).

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

40195818 is a wasteful number, since it uses less digits than its factorization.

40195818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57283 (or 57277 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 40195818 is about 6340.0171924057. The cubic root of 40195818 is about 342.5523545804.

The spelling of 40195818 in words is "forty million, one hundred ninety-five thousand, eight hundred eighteen".