40387447 has 8 divisors (see below), whose sum is σ = 41328000. Its totient is φ = 39455544.

The previous prime is 40387441. The next prime is 40387481. The reversal of 40387447 is 74478304.

It is a happy number.

40387447 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 cyclic number.

It is not a de Polignac number, because 40387447 - 2²³ = 31998839 is a prime.

It is a super-2 number, since 2×40387447² = 3262291750355618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40387441) 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 7 ways as a sum of consecutive naturals, for example, 7804 + ... + 11902.

It is an arithmetic number, because the mean of its divisors is an integer number (5166000).

Almost surely, 2^40387447 is an apocalyptic number.

40387447 is a deficient number, since it is larger than the sum of its proper divisors (940553).

40387447 is a wasteful number, since it uses less digits than its factorization.

40387447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 40387447 is about 6355.1118794243. Note that the first 3 decimals coincide. The cubic root of 40387447 is about 343.0958516297.

The spelling of 40387447 in words is "forty million, three hundred eighty-seven thousand, four hundred forty-seven".