40040663 has 18 divisors (see below), whose sum is σ = 44912592. Its totient is φ = 35664720.

The previous prime is 40040647. The next prime is 40040669. The reversal of 40040663 is 36604004.

It is not a de Polignac number, because 40040663 - 2⁴ = 40040647 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040669) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 563918 + ... + 563988.

It is an arithmetic number, because the mean of its divisors is an integer number (2495144).

Almost surely, 2^40040663 is an apocalyptic number.

40040663 is a deficient number, since it is larger than the sum of its proper divisors (4871929).

40040663 is an equidigital number, since it uses as much as digits as its factorization.

40040663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 40040663 is about 6327.7691961702. The cubic root of 40040663 is about 342.1110380078. Note that the first 3 decimals are identical.

Adding to 40040663 its reverse (36604004), we get a palindrome (76644667).

The spelling of 40040663 in words is "forty million, forty thousand, six hundred sixty-three".