38721445 has 16 divisors (see below), whose sum is σ = 53210880. Its totient is φ = 26498304.

The previous prime is 38721439. The next prime is 38721491. The reversal of 38721445 is 54412783.

It is not a de Polignac number, because 38721445 - 2⁵ = 38721413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38721445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25261 + ... + 26749.

It is an arithmetic number, because the mean of its divisors is an integer number (3325680).

Almost surely, 2^38721445 is an apocalyptic number.

38721445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38721445 is a deficient number, since it is larger than the sum of its proper divisors (14489435).

38721445 is a wasteful number, since it uses less digits than its factorization.

38721445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its digits is 26880, while the sum is 34.

The square root of 38721445 is about 6222.6557835059. The cubic root of 38721445 is about 338.3118307305.

The spelling of 38721445 in words is "thirty-eight million, seven hundred twenty-one thousand, four hundred forty-five".