40247687 has 4 divisors (see below), whose sum is σ = 42615216. Its totient is φ = 37880160.

The previous prime is 40247671. The next prime is 40247693. The reversal of 40247687 is 78674204.

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 40247687 - 2⁴ = 40247671 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 40247687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40247657) 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 3 ways as a sum of consecutive naturals, for example, 1183739 + ... + 1183772.

It is an arithmetic number, because the mean of its divisors is an integer number (10653804).

Almost surely, 2^40247687 is an apocalyptic number.

40247687 is a deficient number, since it is larger than the sum of its proper divisors (2367529).

40247687 is a wasteful number, since it uses less digits than its factorization.

40247687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367528.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 40247687 is about 6344.1064776689. The cubic root of 40247687 is about 342.6996353328.

It can be divided in two parts, 4024 and 7687, that added together give a palindrome (11711).

The spelling of 40247687 in words is "forty million, two hundred forty-seven thousand, six hundred eighty-seven".