38381749 has 12 divisors (see below), whose sum is σ = 45383628. Its totient is φ = 32356800.

The previous prime is 38381747. The next prime is 38381753. The reversal of 38381749 is 94718383.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7800849 + 30580900 = 2793^2 + 5530^2 .

It is not a de Polignac number, because 38381749 - 2¹ = 38381747 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 (38381743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3432 + ... + 9409.

It is an arithmetic number, because the mean of its divisors is an integer number (3781969).

Almost surely, 2^38381749 is an apocalyptic number.

It is an amenable number.

38381749 is a deficient number, since it is larger than the sum of its proper divisors (7001879).

38381749 is a wasteful number, since it uses less digits than its factorization.

38381749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12916 (or 12909 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 38381749 is about 6195.3005576808. The cubic root of 38381749 is about 337.3196080339.

The spelling of 38381749 in words is "thirty-eight million, three hundred eighty-one thousand, seven hundred forty-nine".