28716401 has 12 divisors (see below), whose sum is σ = 33907248. Its totient is φ = 24243912.

The previous prime is 28716287. The next prime is 28716431. The reversal of 28716401 is 10461782.

It is not a de Polignac number, because 28716401 - 2¹⁰ = 28715377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28716431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1091 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (2825604).

Almost surely, 2^28716401 is an apocalyptic number.

It is an amenable number.

28716401 is a deficient number, since it is larger than the sum of its proper divisors (5190847).

28716401 is an equidigital number, since it uses as much as digits as its factorization.

28716401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8828 (or 8821 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28716401 is about 5358.7686085518. The cubic root of 28716401 is about 306.2268989378.

The spelling of 28716401 in words is "twenty-eight million, seven hundred sixteen thousand, four hundred one".