3728449 has 4 divisors (see below), whose sum is σ = 3732480. Its totient is φ = 3724420.

The previous prime is 3728447. The next prime is 3728471. The reversal of 3728449 is 9448273.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3728449 - 2¹ = 3728447 is a prime.

It is a Duffinian number.

3728449 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3728441) 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, 144 + ... + 2734.

It is an arithmetic number, because the mean of its divisors is an integer number (933120).

Almost surely, 2^3728449 is an apocalyptic number.

It is an amenable number.

3728449 is a deficient number, since it is larger than the sum of its proper divisors (4031).

3728449 is a wasteful number, since it uses less digits than its factorization.

3728449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030.

The product of its digits is 48384, while the sum is 37.

The square root of 3728449 is about 1930.9192111531. The cubic root of 3728449 is about 155.0634357065.

It can be divided in two parts, 37284 and 49, that multiplied together give a triangular number (1826916 = T₁₉₁₁).

The spelling of 3728449 in words is "three million, seven hundred twenty-eight thousand, four hundred forty-nine".