38744891 has 4 divisors (see below), whose sum is σ = 38759400. Its totient is φ = 38730384.

The previous prime is 38744869. The next prime is 38744929. The reversal of 38744891 is 19844783.

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 38744891 - 2¹⁴ = 38728507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38744801) 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, 1961 + ... + 9018.

It is an arithmetic number, because the mean of its divisors is an integer number (9689850).

Almost surely, 2^38744891 is an apocalyptic number.

38744891 is a deficient number, since it is larger than the sum of its proper divisors (14509).

38744891 is a wasteful number, since it uses less digits than its factorization.

38744891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14508.

The product of its digits is 193536, while the sum is 44.

The square root of 38744891 is about 6224.5394207122. The cubic root of 38744891 is about 338.3801000385.

The spelling of 38744891 in words is "thirty-eight million, seven hundred forty-four thousand, eight hundred ninety-one".