3728399 has 4 divisors (see below), whose sum is σ = 3732264. Its totient is φ = 3724536.

The previous prime is 3728393. The next prime is 3728407. The reversal of 3728399 is 9938273.

3728399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3728399 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 (3728393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869 + ... + 2865.

It is an arithmetic number, because the mean of its divisors is an integer number (933066).

Almost surely, 2^3728399 is an apocalyptic number.

3728399 is a deficient number, since it is larger than the sum of its proper divisors (3865).

3728399 is a wasteful number, since it uses less digits than its factorization.

3728399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3864.

The product of its digits is 81648, while the sum is 41.

The square root of 3728399 is about 1930.9062639082. The cubic root of 3728399 is about 155.0627425490.

The spelling of 3728399 in words is "three million, seven hundred twenty-eight thousand, three hundred ninety-nine".