38021091 has 4 divisors (see below), whose sum is σ = 50694792. Its totient is φ = 25347392.

The previous prime is 38021083. The next prime is 38021131. The reversal of 38021091 is 19012083.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38021091 - 2³ = 38021083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38021021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6336846 + ... + 6336851.

It is an arithmetic number, because the mean of its divisors is an integer number (12673698).

Almost surely, 2^38021091 is an apocalyptic number.

38021091 is a deficient number, since it is larger than the sum of its proper divisors (12673701).

38021091 is a wasteful number, since it uses less digits than its factorization.

38021091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12673700.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 38021091 is about 6166.1244716597. The cubic root of 38021091 is about 336.2597286701.

The spelling of 38021091 in words is "thirty-eight million, twenty-one thousand, ninety-one".