40639368 has 64 divisors (see below), whose sum is σ = 126673920. Its totient is φ = 10555200.

The previous prime is 40639363. The next prime is 40639381. The reversal of 40639368 is 86393604.

It is not an unprimeable number, because it can be changed into a prime (40639363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9148 + ... + 12843.

It is an arithmetic number, because the mean of its divisors is an integer number (1979280).

Almost surely, 2^40639368 is an apocalyptic number.

It is an amenable number.

40639368 is an abundant number, since it is smaller than the sum of its proper divisors (86034552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40639368 is a wasteful number, since it uses less digits than its factorization.

40639368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22018 (or 22014 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 40639368 is about 6374.9014110024. The cubic root of 40639368 is about 343.8077391496.

It can be divided in two parts, 4063 and 9368, that added together give a palindrome (13431).

The spelling of 40639368 in words is "forty million, six hundred thirty-nine thousand, three hundred sixty-eight".