28471899 has 8 divisors (see below), whose sum is σ = 39960640. Its totient is φ = 17982216.

The previous prime is 28471871. The next prime is 28471903. The reversal of 28471899 is 99817482.

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

It is not a de Polignac number, because 28471899 - 2⁵ = 28471867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28471829) 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, 249697 + ... + 249810.

It is an arithmetic number, because the mean of its divisors is an integer number (4995080).

Almost surely, 2^28471899 is an apocalyptic number.

28471899 is a deficient number, since it is larger than the sum of its proper divisors (11488741).

28471899 is a wasteful number, since it uses less digits than its factorization.

28471899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499529.

The product of its digits is 290304, while the sum is 48.

The square root of 28471899 is about 5335.9065771432. The cubic root of 28471899 is about 305.3553110816.

The spelling of 28471899 in words is "twenty-eight million, four hundred seventy-one thousand, eight hundred ninety-nine".