38836921 has 4 divisors (see below), whose sum is σ = 38852352. Its totient is φ = 38821492.

The previous prime is 38836913. The next prime is 38836951. The reversal of 38836921 is 12963883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38836921 - 2³ = 38836913 is a prime.

It is a super-3 number, since 3×38836921³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38836901) 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, 2965 + ... + 9298.

It is an arithmetic number, because the mean of its divisors is an integer number (9713088).

Almost surely, 2^38836921 is an apocalyptic number.

It is an amenable number.

38836921 is a deficient number, since it is larger than the sum of its proper divisors (15431).

38836921 is a wasteful number, since it uses less digits than its factorization.

38836921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15430.

The product of its digits is 62208, while the sum is 40.

The square root of 38836921 is about 6231.9275509268. The cubic root of 38836921 is about 338.6478041235.

The spelling of 38836921 in words is "thirty-eight million, eight hundred thirty-six thousand, nine hundred twenty-one".