28026398 has 8 divisors (see below), whose sum is σ = 42631920. Its totient is φ = 13815760.

The previous prime is 28026377. The next prime is 28026437. The reversal of 28026398 is 89362082.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98543 + ... + 98826.

It is an arithmetic number, because the mean of its divisors is an integer number (5328990).

Almost surely, 2^28026398 is an apocalyptic number.

28026398 is a deficient number, since it is larger than the sum of its proper divisors (14605522).

28026398 is a wasteful number, since it uses less digits than its factorization.

28026398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197442.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 28026398 is about 5293.9964110301. The cubic root of 28026398 is about 303.7542956372.

Adding to 28026398 its sum of digits (38), we get a square (28026436 = 5294²).

The spelling of 28026398 in words is "twenty-eight million, twenty-six thousand, three hundred ninety-eight".