28924505 has 8 divisors (see below), whose sum is σ = 35448192. Its totient is φ = 22647088.

The previous prime is 28924499. The next prime is 28924529. The reversal of 28924505 is 50542982.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28924505 - 2⁸ = 28924249 is a prime.

It is a Duffinian number.

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, 61307 + ... + 61776.

It is an arithmetic number, because the mean of its divisors is an integer number (4431024).

Almost surely, 2^28924505 is an apocalyptic number.

It is an amenable number.

28924505 is a deficient number, since it is larger than the sum of its proper divisors (6523687).

28924505 is a wasteful number, since it uses less digits than its factorization.

28924505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123135.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 28924505 is about 5378.1507044708. The cubic root of 28924505 is about 306.9648479453.

The spelling of 28924505 in words is "twenty-eight million, nine hundred twenty-four thousand, five hundred five".