28427199 has 8 divisors (see below), whose sum is σ = 37931520. Its totient is φ = 18937176.

The previous prime is 28427197. The next prime is 28427219. The reversal of 28427199 is 99172482.

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

It is not a de Polignac number, because 28427199 - 2¹ = 28427197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28427199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28427197) 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, 2584 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (4741440).

Almost surely, 2^28427199 is an apocalyptic number.

28427199 is a deficient number, since it is larger than the sum of its proper divisors (9504321).

28427199 is a wasteful number, since it uses less digits than its factorization.

28427199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7149.

The product of its digits is 72576, while the sum is 42.

The square root of 28427199 is about 5331.7163277879. The cubic root of 28427199 is about 305.1954279201.

The spelling of 28427199 in words is "twenty-eight million, four hundred twenty-seven thousand, one hundred ninety-nine".