28758413 has 4 divisors (see below), whose sum is σ = 28838880. Its totient is φ = 28677948.

The previous prime is 28758409. The next prime is 28758439. The reversal of 28758413 is 31485782.

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.

It is a cyclic number.

It is not a de Polignac number, because 28758413 - 2² = 28758409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28758473) 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, 39695 + ... + 40412.

It is an arithmetic number, because the mean of its divisors is an integer number (7209720).

Almost surely, 2^28758413 is an apocalyptic number.

It is an amenable number.

28758413 is a deficient number, since it is larger than the sum of its proper divisors (80467).

28758413 is an equidigital number, since it uses as much as digits as its factorization.

28758413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80466.

The product of its digits is 53760, while the sum is 38.

The square root of 28758413 is about 5362.6871062929. The cubic root of 28758413 is about 306.3761624853.

The spelling of 28758413 in words is "twenty-eight million, seven hundred fifty-eight thousand, four hundred thirteen".