38840091 has 4 divisors (see below), whose sum is σ = 51786792. Its totient is φ = 25893392.

The previous prime is 38840083. The next prime is 38840093. The reversal of 38840091 is 19004883.

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 38840091 - 2³ = 38840083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38840093) 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, 6473346 + ... + 6473351.

It is an arithmetic number, because the mean of its divisors is an integer number (12946698).

Almost surely, 2^38840091 is an apocalyptic number.

38840091 is a deficient number, since it is larger than the sum of its proper divisors (12946701).

38840091 is a wasteful number, since it uses less digits than its factorization.

38840091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12946700.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 38840091 is about 6232.1818811713. The cubic root of 38840091 is about 338.6570177301.

The spelling of 38840091 in words is "thirty-eight million, eight hundred forty thousand, ninety-one".