28704413 has 8 divisors (see below), whose sum is σ = 29306880. Its totient is φ = 28108080.

The previous prime is 28704397. The next prime is 28704427. The reversal of 28704413 is 31440782.

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

It is a cyclic number.

It is not a de Polignac number, because 28704413 - 2⁴ = 28704397 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 (28704493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8603 + ... + 11463.

It is an arithmetic number, because the mean of its divisors is an integer number (3663360).

Almost surely, 2^28704413 is an apocalyptic number.

It is an amenable number.

28704413 is a deficient number, since it is larger than the sum of its proper divisors (602467).

28704413 is a wasteful number, since it uses less digits than its factorization.

28704413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28704413 is about 5357.6499512379. The cubic root of 28704413 is about 306.1842803308.

The spelling of 28704413 in words is "twenty-eight million, seven hundred four thousand, four hundred thirteen".