38090813 has 8 divisors (see below), whose sum is σ = 39098400. Its totient is φ = 37095408.

The previous prime is 38090809. The next prime is 38090849. The reversal of 38090813 is 31809083.

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

It is a cyclic number.

It is not a de Polignac number, because 38090813 - 2² = 38090809 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 38090813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38090803) 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, 3470 + ... + 9392.

It is an arithmetic number, because the mean of its divisors is an integer number (4887300).

Almost surely, 2^38090813 is an apocalyptic number.

It is an amenable number.

38090813 is a deficient number, since it is larger than the sum of its proper divisors (1007587).

38090813 is a wasteful number, since it uses less digits than its factorization.

38090813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6091.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 38090813 is about 6171.7755143881. The cubic root of 38090813 is about 336.4651443488.

Adding to 38090813 its reverse (31809083), we get a palindrome (69899896).

The spelling of 38090813 in words is "thirty-eight million, ninety thousand, eight hundred thirteen".