40447487 has 4 divisors (see below), whose sum is σ = 40485456. Its totient is φ = 40409520.

The previous prime is 40447483. The next prime is 40447507. The reversal of 40447487 is 78474404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40447487 - 2² = 40447483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40447487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40447483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17339 + ... + 19532.

It is an arithmetic number, because the mean of its divisors is an integer number (10121364).

Almost surely, 2^40447487 is an apocalyptic number.

40447487 is a deficient number, since it is larger than the sum of its proper divisors (37969).

40447487 is a wasteful number, since it uses less digits than its factorization.

40447487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37968.

The product of its (nonzero) digits is 100352, while the sum is 38.

The square root of 40447487 is about 6359.8338814784. The cubic root of 40447487 is about 343.2657829421.

The spelling of 40447487 in words is "forty million, four hundred forty-seven thousand, four hundred eighty-seven".