28127998 has 4 divisors (see below), whose sum is σ = 42192000. Its totient is φ = 14063998.

The previous prime is 28127987. The next prime is 28128017. The reversal of 28127998 is 89972182.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7031998 + ... + 7032001.

It is an arithmetic number, because the mean of its divisors is an integer number (10548000).

Almost surely, 2^28127998 is an apocalyptic number.

28127998 is a deficient number, since it is larger than the sum of its proper divisors (14064002).

28127998 is a wasteful number, since it uses less digits than its factorization.

28127998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14064001.

The product of its digits is 145152, while the sum is 46.

The square root of 28127998 is about 5303.5835055178. The cubic root of 28127998 is about 304.1209049898.

The spelling of 28127998 in words is "twenty-eight million, one hundred twenty-seven thousand, nine hundred ninety-eight".