40663634 has 8 divisors (see below), whose sum is σ = 66540528. Its totient is φ = 18483460.

The previous prime is 40663633. The next prime is 40663639. The reversal of 40663634 is 43636604.

40663634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40663634² = 3307062260171912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40663634.

It is not an unprimeable number, because it can be changed into a prime (40663631) 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, 924152 + ... + 924195.

It is an arithmetic number, because the mean of its divisors is an integer number (8317566).

Almost surely, 2^40663634 is an apocalyptic number.

40663634 is a deficient number, since it is larger than the sum of its proper divisors (25876894).

40663634 is a wasteful number, since it uses less digits than its factorization.

40663634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848360.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 40663634 is about 6376.8043720974. The cubic root of 40663634 is about 343.8761553926.

The spelling of 40663634 in words is "forty million, six hundred sixty-three thousand, six hundred thirty-four".