28608591 has 8 divisors (see below), whose sum is σ = 41612544. Its totient is φ = 17338520.

The previous prime is 28608581. The next prime is 28608599. The reversal of 28608591 is 19580682.

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 28608591 - 2⁹ = 28608079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28608599) 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, 433431 + ... + 433496.

It is an arithmetic number, because the mean of its divisors is an integer number (5201568).

Almost surely, 2^28608591 is an apocalyptic number.

28608591 is a deficient number, since it is larger than the sum of its proper divisors (13003953).

28608591 is a wasteful number, since it uses less digits than its factorization.

28608591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866941.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 28608591 is about 5348.6999354983. The cubic root of 28608591 is about 305.8431957526.

The spelling of 28608591 in words is "twenty-eight million, six hundred eight thousand, five hundred ninety-one".