38450891 has 4 divisors (see below), whose sum is σ = 38476152. Its totient is φ = 38425632.

The previous prime is 38450869. The next prime is 38450903. The reversal of 38450891 is 19805483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19805483 = 3739 ⋅5297.

It is a cyclic number.

It is not a de Polignac number, because 38450891 - 2¹⁰ = 38449867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38452891) 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, 10190 + ... + 13443.

It is an arithmetic number, because the mean of its divisors is an integer number (9619038).

Almost surely, 2^38450891 is an apocalyptic number.

38450891 is a deficient number, since it is larger than the sum of its proper divisors (25261).

38450891 is a wasteful number, since it uses less digits than its factorization.

38450891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25260.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 38450891 is about 6200.8782442490. The cubic root of 38450891 is about 337.5220389815.

The spelling of 38450891 in words is "thirty-eight million, four hundred fifty thousand, eight hundred ninety-one".