40808986 has 4 divisors (see below), whose sum is σ = 61213482. Its totient is φ = 20404492.

The previous prime is 40808983. The next prime is 40808987. The reversal of 40808986 is 68980804.

40808986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 33350625 + 7458361 = 5775^2 + 2731^2 .

It is not an unprimeable number, because it can be changed into a prime (40808983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202245 + ... + 10202248.

Almost surely, 2^40808986 is an apocalyptic number.

40808986 is a deficient number, since it is larger than the sum of its proper divisors (20404496).

40808986 is a wasteful number, since it uses less digits than its factorization.

40808986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20404495.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 40808986 is about 6388.1911367773. The cubic root of 40808986 is about 344.2853961583.

The spelling of 40808986 in words is "forty million, eight hundred eight thousand, nine hundred eighty-six".