28608401 has 4 divisors (see below), whose sum is σ = 28833792. Its totient is φ = 28383012.

The previous prime is 28608379. The next prime is 28608403. The reversal of 28608401 is 10480682.

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 28608401 - 2⁶ = 28608337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28608403) 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, 112505 + ... + 112758.

It is an arithmetic number, because the mean of its divisors is an integer number (7208448).

Almost surely, 2^28608401 is an apocalyptic number.

It is an amenable number.

28608401 is a deficient number, since it is larger than the sum of its proper divisors (225391).

28608401 is a wasteful number, since it uses less digits than its factorization.

28608401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225390.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28608401 is about 5348.6821741435. The cubic root of 28608401 is about 305.8425186793.

The spelling of 28608401 in words is "twenty-eight million, six hundred eight thousand, four hundred one".