38728673 has 4 divisors (see below), whose sum is σ = 38803248. Its totient is φ = 38654100.

The previous prime is 38728663. The next prime is 38728691. The reversal of 38728673 is 37682783.

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 38728673 - 2⁶ = 38728609 is a prime.

It is a super-2 number, since 2×38728673² = 2999820224681858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38728663) 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, 36503 + ... + 37548.

It is an arithmetic number, because the mean of its divisors is an integer number (9700812).

Almost surely, 2^38728673 is an apocalyptic number.

It is an amenable number.

38728673 is a deficient number, since it is larger than the sum of its proper divisors (74575).

38728673 is an equidigital number, since it uses as much as digits as its factorization.

38728673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74574.

The product of its digits is 338688, while the sum is 44.

The square root of 38728673 is about 6223.2365373654. The cubic root of 38728673 is about 338.3328799258.

The spelling of 38728673 in words is "thirty-eight million, seven hundred twenty-eight thousand, six hundred seventy-three".