40247686 has 4 divisors (see below), whose sum is σ = 60371532. Its totient is φ = 20123842.

The previous prime is 40247671. The next prime is 40247693. The reversal of 40247686 is 68674204.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061920 + ... + 10061923.

It is an arithmetic number, because the mean of its divisors is an integer number (15092883).

Almost surely, 2^40247686 is an apocalyptic number.

40247686 is a deficient number, since it is larger than the sum of its proper divisors (20123846).

40247686 is a wasteful number, since it uses less digits than its factorization.

40247686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20123845.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 40247686 is about 6344.1063988556. The cubic root of 40247686 is about 342.6996324946.

The spelling of 40247686 in words is "forty million, two hundred forty-seven thousand, six hundred eighty-six".