40397712 has 80 divisors (see below), whose sum is σ = 114135552. Its totient is φ = 12257280.

The previous prime is 40397701. The next prime is 40397719. The reversal of 40397712 is 21779304.

It is not an unprimeable number, because it can be changed into a prime (40397719) 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, 24498 + ... + 26094.

Almost surely, 2^40397712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40397712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57067776).

40397712 is an abundant number, since it is smaller than the sum of its proper divisors (73737840).

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

40397712 is a wasteful number, since it uses less digits than its factorization.

40397712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1650 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 40397712 is about 6355.9194456821. The cubic root of 40397712 is about 343.1249166061.

The spelling of 40397712 in words is "forty million, three hundred ninety-seven thousand, seven hundred twelve".