40404172 has 12 divisors (see below), whose sum is σ = 74866680. Its totient is φ = 19013696.

The previous prime is 40404157. The next prime is 40404173. The reversal of 40404172 is 27140404.

It is not an unprimeable number, because it can be changed into a prime (40404173) 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, 297022 + ... + 297157.

It is an arithmetic number, because the mean of its divisors is an integer number (6238890).

Almost surely, 2^40404172 is an apocalyptic number.

It is an amenable number.

40404172 is a deficient number, since it is larger than the sum of its proper divisors (34462508).

40404172 is a wasteful number, since it uses less digits than its factorization.

40404172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594200 (or 594198 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 40404172 is about 6356.4276130544. The cubic root of 40404172 is about 343.1432053384.

Adding to 40404172 its reverse (27140404), we get a palindrome (67544576).

The spelling of 40404172 in words is "forty million, four hundred four thousand, one hundred seventy-two".