38691812 has 12 divisors (see below), whose sum is σ = 68821116. Its totient is φ = 19028640.

The previous prime is 38691811. The next prime is 38691841. The reversal of 38691812 is 21819683.

38691812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 21585316 + 17106496 = 4646^2 + 4136^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (38691811) 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 in 3 ways as a sum of consecutive naturals, for example, 79043 + ... + 79530.

It is an arithmetic number, because the mean of its divisors is an integer number (5735093).

Almost surely, 2^38691812 is an apocalyptic number.

It is an amenable number.

38691812 is a deficient number, since it is larger than the sum of its proper divisors (30129304).

38691812 is a wasteful number, since it uses less digits than its factorization.

38691812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158638 (or 158636 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 38691812 is about 6220.2742704804. The cubic root of 38691812 is about 338.2255068778.

The spelling of 38691812 in words is "thirty-eight million, six hundred ninety-one thousand, eight hundred twelve".