40020194 has 32 divisors (see below), whose sum is σ = 66562560. Its totient is φ = 17971200.

The previous prime is 40020191. The next prime is 40020221. The reversal of 40020194 is 49102004.

It is not an unprimeable number, because it can be changed into a prime (40020191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62114 + ... + 62754.

It is an arithmetic number, because the mean of its divisors is an integer number (2080080).

Almost surely, 2^40020194 is an apocalyptic number.

40020194 is a deficient number, since it is larger than the sum of its proper divisors (26542366).

40020194 is a wasteful number, since it uses less digits than its factorization.

40020194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40020194 is about 6326.1515947691. The cubic root of 40020194 is about 342.0527317434.

Adding to 40020194 its reverse (49102004), we get a palindrome (89122198).

The spelling of 40020194 in words is "forty million, twenty thousand, one hundred ninety-four".