38281845 has 32 divisors (see below), whose sum is σ = 70244352. Its totient is φ = 17439552.

The previous prime is 38281843. The next prime is 38281849. The reversal of 38281845 is 54818283.

It is not a de Polignac number, because 38281845 - 2¹ = 38281843 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38281843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46104 + ... + 46926.

It is an arithmetic number, because the mean of its divisors is an integer number (2195136).

Almost surely, 2^38281845 is an apocalyptic number.

38281845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38281845 is a deficient number, since it is larger than the sum of its proper divisors (31962507).

38281845 is a wasteful number, since it uses less digits than its factorization.

38281845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its digits is 61440, while the sum is 39.

The square root of 38281845 is about 6187.2324184566. The cubic root of 38281845 is about 337.0266835731.

The spelling of 38281845 in words is "thirty-eight million, two hundred eighty-one thousand, eight hundred forty-five".