38851813 has 32 divisors (see below), whose sum is σ = 53625600. Its totient is φ = 27164160.

The previous prime is 38851777. The next prime is 38851843. The reversal of 38851813 is 31815883.

It is a cyclic number.

It is not a de Polignac number, because 38851813 - 2¹⁷ = 38720741 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38851843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36513 + ... + 37561.

It is an arithmetic number, because the mean of its divisors is an integer number (1675800).

Almost surely, 2^38851813 is an apocalyptic number.

It is an amenable number.

38851813 is a deficient number, since it is larger than the sum of its proper divisors (14773787).

38851813 is a wasteful number, since it uses less digits than its factorization.

38851813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117.

The product of its digits is 23040, while the sum is 37.

The square root of 38851813 is about 6233.1222513280. The cubic root of 38851813 is about 338.6910833752.

The spelling of 38851813 in words is "thirty-eight million, eight hundred fifty-one thousand, eight hundred thirteen".