36991816 has 16 divisors (see below), whose sum is σ = 69570540. Its totient is φ = 18439680.

The previous prime is 36991811. The next prime is 36991817. The reversal of 36991816 is 61819963.

It can be written as a sum of positive squares in 2 ways, for example, as 34269316 + 2722500 = 5854^2 + 1650^2 .

It is not an unprimeable number, because it can be changed into a prime (36991811) 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, 4165 + ... + 9556.

Almost surely, 2^36991816 is an apocalyptic number.

It is an amenable number.

36991816 is a deficient number, since it is larger than the sum of its proper divisors (32578724).

36991816 is a wasteful number, since it uses less digits than its factorization.

36991816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14064 (or 14060 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 36991816 is about 6082.0897724384. The cubic root of 36991816 is about 333.1976149713.

The spelling of 36991816 in words is "thirty-six million, nine hundred ninety-one thousand, eight hundred sixteen".