28899771 has 8 divisors (see below), whose sum is σ = 38601024. Its totient is φ = 19232520.

The previous prime is 28899763. The next prime is 28899791. The reversal of 28899771 is 17799882.

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

It is not a de Polignac number, because 28899771 - 2³ = 28899763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28899721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6445 + ... + 9966.

It is an arithmetic number, because the mean of its divisors is an integer number (4825128).

Almost surely, 2^28899771 is an apocalyptic number.

28899771 is a deficient number, since it is larger than the sum of its proper divisors (9701253).

28899771 is a wasteful number, since it uses less digits than its factorization.

28899771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17001.

The product of its digits is 508032, while the sum is 51.

The square root of 28899771 is about 5375.8507233739. The cubic root of 28899771 is about 306.8773254594.

The spelling of 28899771 in words is "twenty-eight million, eight hundred ninety-nine thousand, seven hundred seventy-one".