28493413 has 8 divisors (see below), whose sum is σ = 30990456. Its totient is φ = 26040000.

The previous prime is 28493323. The next prime is 28493429. The reversal of 28493413 is 31439482.

It can be written as a sum of positive squares in 4 ways, for example, as 11985444 + 16507969 = 3462^2 + 4063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28493413 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 (28493453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9538 + ... + 12163.

It is an arithmetic number, because the mean of its divisors is an integer number (3873807).

Almost surely, 2^28493413 is an apocalyptic number.

It is an amenable number.

28493413 is a deficient number, since it is larger than the sum of its proper divisors (2497043).

28493413 is a wasteful number, since it uses less digits than its factorization.

28493413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21815.

The product of its digits is 20736, while the sum is 34.

The square root of 28493413 is about 5337.9221612909. The cubic root of 28493413 is about 305.4322028055.

It can be divided in two parts, 2849341 and 3, that added together give a square (2849344 = 1688²).

The spelling of 28493413 in words is "twenty-eight million, four hundred ninety-three thousand, four hundred thirteen".