28159898 has 8 divisors (see below), whose sum is σ = 45489108. Its totient is φ = 12996864.

The previous prime is 28159897. The next prime is 28159927. The reversal of 28159898 is 89895182.

It can be written as a sum of positive squares in 2 ways, for example, as 27741289 + 418609 = 5267^2 + 647^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28159897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541511 + ... + 541562.

Almost surely, 2^28159898 is an apocalyptic number.

28159898 is a deficient number, since it is larger than the sum of its proper divisors (17329210).

28159898 is a wasteful number, since it uses less digits than its factorization.

28159898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083088.

The product of its digits is 414720, while the sum is 50.

The square root of 28159898 is about 5306.5900538858. The cubic root of 28159898 is about 304.2358295298.

The spelling of 28159898 in words is "twenty-eight million, one hundred fifty-nine thousand, eight hundred ninety-eight".