28894945 has 8 divisors (see below), whose sum is σ = 35792640. Its totient is φ = 22370160.

The previous prime is 28894939. The next prime is 28894967. The reversal of 28894945 is 54949882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28894945 - 2³ = 28894937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93055 + ... + 93364.

It is an arithmetic number, because the mean of its divisors is an integer number (4474080).

Almost surely, 2^28894945 is an apocalyptic number.

It is an amenable number.

28894945 is a deficient number, since it is larger than the sum of its proper divisors (6897695).

28894945 is a wasteful number, since it uses less digits than its factorization.

28894945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186455.

The product of its digits is 829440, while the sum is 49.

The square root of 28894945 is about 5375.4018454437. The cubic root of 28894945 is about 306.8602425972.

The spelling of 28894945 in words is "twenty-eight million, eight hundred ninety-four thousand, nine hundred forty-five".