38768021 has 4 divisors (see below), whose sum is σ = 38780832. Its totient is φ = 38755212.

The previous prime is 38767987. The next prime is 38768029. The reversal of 38768021 is 12086783.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 38768021 - 2¹⁸ = 38505877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38768029) 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, 950 + ... + 8856.

It is an arithmetic number, because the mean of its divisors is an integer number (9695208).

Almost surely, 2^38768021 is an apocalyptic number.

It is an amenable number.

38768021 is a deficient number, since it is larger than the sum of its proper divisors (12811).

38768021 is an equidigital number, since it uses as much as digits as its factorization.

38768021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12810.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 38768021 is about 6226.3971122954. The cubic root of 38768021 is about 338.4474222458.

The spelling of 38768021 in words is "thirty-eight million, seven hundred sixty-eight thousand, twenty-one".