40391133 has 16 divisors (see below), whose sum is σ = 57174336. Its totient is φ = 25276160.

The previous prime is 40391129. The next prime is 40391173. The reversal of 40391133 is 33119304.

40391133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40391133 - 2² = 40391129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40391123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24235 + ... + 25847.

It is an arithmetic number, because the mean of its divisors is an integer number (3573396).

Almost surely, 2^40391133 is an apocalyptic number.

It is an amenable number.

40391133 is a deficient number, since it is larger than the sum of its proper divisors (16783203).

40391133 is a wasteful number, since it uses less digits than its factorization.

40391133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 40391133 is about 6355.4018755701. The cubic root of 40391133 is about 343.1062889721.

The spelling of 40391133 in words is "forty million, three hundred ninety-one thousand, one hundred thirty-three".