28404845 has 16 divisors (see below), whose sum is σ = 39452160. Its totient is φ = 19229184.

The previous prime is 28404809. The next prime is 28404853. The reversal of 28404845 is 54840482.

It is a cyclic number.

It is not a de Polignac number, because 28404845 - 2¹⁶ = 28339309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

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, 2372 + ... + 7901.

It is an arithmetic number, because the mean of its divisors is an integer number (2465760).

Almost surely, 2^28404845 is an apocalyptic number.

It is an amenable number.

28404845 is a deficient number, since it is larger than the sum of its proper divisors (11047315).

28404845 is a wasteful number, since it uses less digits than its factorization.

28404845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10364.

The product of its (nonzero) digits is 40960, while the sum is 35.

The square root of 28404845 is about 5329.6195924287. The cubic root of 28404845 is about 305.1154091600.

The spelling of 28404845 in words is "twenty-eight million, four hundred four thousand, eight hundred forty-five".