40440133 has 4 divisors (see below), whose sum is σ = 41103148. Its totient is φ = 39777120.

The previous prime is 40440131. The next prime is 40440157. The reversal of 40440133 is 33104404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2024929 + 38415204 = 1423^2 + 6198^2 .

It is a cyclic number.

It is not a de Polignac number, because 40440133 - 2¹ = 40440131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40440133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440131) 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, 331416 + ... + 331537.

It is an arithmetic number, because the mean of its divisors is an integer number (10275787).

Almost surely, 2^40440133 is an apocalyptic number.

It is an amenable number.

40440133 is a deficient number, since it is larger than the sum of its proper divisors (663015).

40440133 is an equidigital number, since it uses as much as digits as its factorization.

40440133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663014.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40440133 is about 6359.2556954411. The cubic root of 40440133 is about 343.2449779448.

Adding to 40440133 its reverse (33104404), we get a palindrome (73544537).

The spelling of 40440133 in words is "forty million, four hundred forty thousand, one hundred thirty-three".