28924871 has 8 divisors (see below), whose sum is σ = 30673584. Its totient is φ = 27181440.

The previous prime is 28924817. The next prime is 28924921. The reversal of 28924871 is 17842982.

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 28924871 - 2¹⁴ = 28908487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28924801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19181 + ... + 20633.

It is an arithmetic number, because the mean of its divisors is an integer number (3834198).

Almost surely, 2^28924871 is an apocalyptic number.

28924871 is a deficient number, since it is larger than the sum of its proper divisors (1748713).

28924871 is a wasteful number, since it uses less digits than its factorization.

28924871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641.

The product of its digits is 64512, while the sum is 41.

The square root of 28924871 is about 5378.1847309292. The cubic root of 28924871 is about 306.9661426798.

The spelling of 28924871 in words is "twenty-eight million, nine hundred twenty-four thousand, eight hundred seventy-one".