40387443 has 16 divisors (see below), whose sum is σ = 54875040. Its totient is φ = 26417664.

The previous prime is 40387441. The next prime is 40387481. The reversal of 40387443 is 34478304.

It is not a de Polignac number, because 40387443 - 2¹ = 40387441 is a prime.

It is a super-3 number, since 3×40387443³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (40387441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36405 + ... + 37497.

It is an arithmetic number, because the mean of its divisors is an integer number (3429690).

Almost surely, 2^40387443 is an apocalyptic number.

40387443 is a deficient number, since it is larger than the sum of its proper divisors (14487597).

40387443 is a wasteful number, since it uses less digits than its factorization.

40387443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 40387443 is about 6355.1115647170. Note that the first 3 decimals coincide. The cubic root of 40387443 is about 343.0958403029.

The spelling of 40387443 in words is "forty million, three hundred eighty-seven thousand, four hundred forty-three".