28608645 has 32 divisors (see below), whose sum is σ = 51004800. Its totient is φ = 13595904.

The previous prime is 28608641. The next prime is 28608653. The reversal of 28608645 is 54680682.

It is not a de Polignac number, because 28608645 - 2² = 28608641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28608641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3126 + ... + 8184.

It is an arithmetic number, because the mean of its divisors is an integer number (1593900).

Almost surely, 2^28608645 is an apocalyptic number.

It is an amenable number.

28608645 is a deficient number, since it is larger than the sum of its proper divisors (22396155).

28608645 is a wasteful number, since it uses less digits than its factorization.

28608645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 28608645 is about 5348.7049834516. The cubic root of 28608645 is about 305.8433881834.

The spelling of 28608645 in words is "twenty-eight million, six hundred eight thousand, six hundred forty-five".