38785813 has 8 divisors (see below), whose sum is σ = 43006176. Its totient is φ = 34681200.

The previous prime is 38785793. The next prime is 38785819. The reversal of 38785813 is 31858783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38785813 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 38785813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38785819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28231 + ... + 29572.

It is an arithmetic number, because the mean of its divisors is an integer number (5375772).

Almost surely, 2^38785813 is an apocalyptic number.

It is an amenable number.

38785813 is a deficient number, since it is larger than the sum of its proper divisors (4220363).

38785813 is a wasteful number, since it uses less digits than its factorization.

38785813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57875.

The product of its digits is 161280, while the sum is 43.

The square root of 38785813 is about 6227.8257040479. The cubic root of 38785813 is about 338.4991894449.

The spelling of 38785813 in words is "thirty-eight million, seven hundred eighty-five thousand, eight hundred thirteen".