40389336 has 48 divisors (see below), whose sum is σ = 117804960. Its totient is φ = 12427200.

The previous prime is 40389319. The next prime is 40389337. The reversal of 40389336 is 63398304.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40389336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40389337) 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 11 ways as a sum of consecutive naturals, for example, 20640 + ... + 22511.

It is an arithmetic number, because the mean of its divisors is an integer number (2454270).

Almost surely, 2^40389336 is an apocalyptic number.

It is an amenable number.

40389336 is an abundant number, since it is smaller than the sum of its proper divisors (77415624).

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

40389336 is a wasteful number, since it uses less digits than its factorization.

40389336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43176 (or 43169 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 40389336 is about 6355.2604982015. The cubic root of 40389336 is about 343.1012006346.

It can be divided in two parts, 40 and 389336, that added together give a square (389376 = 624²).

The spelling of 40389336 in words is "forty million, three hundred eighty-nine thousand, three hundred thirty-six".