40493187 has 24 divisors (see below), whose sum is σ = 67481856. Its totient is φ = 22918896.

The previous prime is 40493149. The next prime is 40493191. The reversal of 40493187 is 78139404.

It is a happy number.

It is not a de Polignac number, because 40493187 - 2⁸ = 40492931 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40493107) 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 23 ways as a sum of consecutive naturals, for example, 3738 + ... + 9744.

It is an arithmetic number, because the mean of its divisors is an integer number (2811744).

Almost surely, 2^40493187 is an apocalyptic number.

40493187 is a deficient number, since it is larger than the sum of its proper divisors (26988669).

40493187 is a wasteful number, since it uses less digits than its factorization.

40493187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6127 (or 6124 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 40493187 is about 6363.4257283322. The cubic root of 40493187 is about 343.3950150487.

The spelling of 40493187 in words is "forty million, four hundred ninety-three thousand, one hundred eighty-seven".