28385445 has 32 divisors (see below), whose sum is σ = 50264064. Its totient is φ = 13563200.

The previous prime is 28385437. The next prime is 28385459. The reversal of 28385445 is 54458382.

It is not a de Polignac number, because 28385445 - 2³ = 28385437 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10504 + ... + 12926.

It is an arithmetic number, because the mean of its divisors is an integer number (1570752).

Almost surely, 2^28385445 is an apocalyptic number.

It is an amenable number.

28385445 is a deficient number, since it is larger than the sum of its proper divisors (21878619).

28385445 is a wasteful number, since it uses less digits than its factorization.

28385445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513.

The product of its digits is 153600, while the sum is 39.

The square root of 28385445 is about 5327.7992642366. The cubic root of 28385445 is about 305.0459305549.

The spelling of 28385445 in words is "twenty-eight million, three hundred eighty-five thousand, four hundred forty-five".