38398091 has 4 divisors (see below), whose sum is σ = 38770992. Its totient is φ = 38025192.

The previous prime is 38398049. The next prime is 38398103. The reversal of 38398091 is 19089383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19089383 = 829 ⋅23027.

It is a cyclic number.

It is not a de Polignac number, because 38398091 - 2²² = 34203787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38698091) 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, 186296 + ... + 186501.

It is an arithmetic number, because the mean of its divisors is an integer number (9692748).

Almost surely, 2^38398091 is an apocalyptic number.

38398091 is a deficient number, since it is larger than the sum of its proper divisors (372901).

38398091 is a wasteful number, since it uses less digits than its factorization.

38398091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372900.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 38398091 is about 6196.6193202423. The cubic root of 38398091 is about 337.3674753581.

The spelling of 38398091 in words is "thirty-eight million, three hundred ninety-eight thousand, ninety-one".