28578345 has 16 divisors (see below), whose sum is σ = 46241280. Its totient is φ = 15069824.

The previous prime is 28578313. The next prime is 28578371. The reversal of 28578345 is 54387582.

It is a cyclic number.

It is not a de Polignac number, because 28578345 - 2⁵ = 28578313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28578297 and 28578306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9369 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (2890080).

Almost surely, 2^28578345 is an apocalyptic number.

It is an amenable number.

28578345 is a deficient number, since it is larger than the sum of its proper divisors (17662935).

28578345 is a wasteful number, since it uses less digits than its factorization.

28578345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21504.

The product of its digits is 268800, while the sum is 42.

The square root of 28578345 is about 5345.8717717506. The cubic root of 28578345 is about 305.7353750492.

The spelling of 28578345 in words is "twenty-eight million, five hundred seventy-eight thousand, three hundred forty-five".