40138633 has 4 divisors (see below), whose sum is σ = 40162000. Its totient is φ = 40115268.

The previous prime is 40138607. The next prime is 40138661. The reversal of 40138633 is 33683104.

40138633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40138633 - 2⁵ = 40138601 is a prime.

It is a super-2 number, since 2×40138633² = 3222219718217378, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (40138603) 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 3 ways as a sum of consecutive naturals, for example, 8883 + ... + 12616.

It is an arithmetic number, because the mean of its divisors is an integer number (10040500).

Almost surely, 2^40138633 is an apocalyptic number.

It is an amenable number.

40138633 is a deficient number, since it is larger than the sum of its proper divisors (23367).

40138633 is a wasteful number, since it uses less digits than its factorization.

40138633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23366.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 40138633 is about 6335.5057414543. The cubic root of 40138633 is about 342.3898322571.

The spelling of 40138633 in words is "forty million, one hundred thirty-eight thousand, six hundred thirty-three".