40355687 has 4 divisors (see below), whose sum is σ = 40466016. Its totient is φ = 40245360.

The previous prime is 40355683. The next prime is 40355699. The reversal of 40355687 is 78655304.

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 40355687 - 2² = 40355683 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 40355687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40355681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54614 + ... + 55347.

It is an arithmetic number, because the mean of its divisors is an integer number (10116504).

Almost surely, 2^40355687 is an apocalyptic number.

40355687 is a deficient number, since it is larger than the sum of its proper divisors (110329).

40355687 is a wasteful number, since it uses less digits than its factorization.

40355687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110328.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 40355687 is about 6352.6126121463. The cubic root of 40355687 is about 343.0058931348.

The spelling of 40355687 in words is "forty million, three hundred fifty-five thousand, six hundred eighty-seven".