38189749 has 4 divisors (see below), whose sum is σ = 41127436. Its totient is φ = 35252064.

The previous prime is 38189747. The next prime is 38189771. The reversal of 38189749 is 94798183.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11222500 + 26967249 = 3350^2 + 5193^2 .

It is a cyclic number.

It is not a de Polignac number, because 38189749 - 2¹ = 38189747 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 (38189747) 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, 1468824 + ... + 1468849.

It is an arithmetic number, because the mean of its divisors is an integer number (10281859).

Almost surely, 2^38189749 is an apocalyptic number.

It is an amenable number.

38189749 is a deficient number, since it is larger than the sum of its proper divisors (2937687).

38189749 is a wasteful number, since it uses less digits than its factorization.

38189749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937686.

The product of its digits is 435456, while the sum is 49.

The square root of 38189749 is about 6179.7855140773. The cubic root of 38189749 is about 336.7562008490.

The spelling of 38189749 in words is "thirty-eight million, one hundred eighty-nine thousand, seven hundred forty-nine".