38315813 has 4 divisors (see below), whose sum is σ = 38383488. Its totient is φ = 38248140.

The previous prime is 38315803. The next prime is 38315819. The reversal of 38315813 is 31851383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38315813 - 2¹² = 38311717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38315813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38315819) 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, 32981 + ... + 34122.

It is an arithmetic number, because the mean of its divisors is an integer number (9595872).

Almost surely, 2^38315813 is an apocalyptic number.

It is an amenable number.

38315813 is a deficient number, since it is larger than the sum of its proper divisors (67675).

38315813 is an equidigital number, since it uses as much as digits as its factorization.

38315813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67674.

The product of its digits is 8640, while the sum is 32.

The square root of 38315813 is about 6189.9768174041. The cubic root of 38315813 is about 337.1263368860.

The spelling of 38315813 in words is "thirty-eight million, three hundred fifteen thousand, eight hundred thirteen".