38721275 has 12 divisors (see below), whose sum is σ = 48803424. Its totient is φ = 30468000.

The previous prime is 38721271. The next prime is 38721281. The reversal of 38721275 is 57212783.

It is not a de Polignac number, because 38721275 - 2² = 38721271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38721271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11171 + ... + 14220.

It is an arithmetic number, because the mean of its divisors is an integer number (4066952).

Almost surely, 2^38721275 is an apocalyptic number.

38721275 is a deficient number, since it is larger than the sum of its proper divisors (10082149).

38721275 is a wasteful number, since it uses less digits than its factorization.

38721275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25462 (or 25457 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 38721275 is about 6222.6421237285. The cubic root of 38721275 is about 338.3113356294.

It can be divided in two parts, 3 and 8721275, that added together give a palindrome (8721278).

The spelling of 38721275 in words is "thirty-eight million, seven hundred twenty-one thousand, two hundred seventy-five".