28724198 has 16 divisors (see below), whose sum is σ = 44350416. Its totient is φ = 13946400.

The previous prime is 28724183. The next prime is 28724207. The reversal of 28724198 is 89142782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9365 + ... + 12047.

It is an arithmetic number, because the mean of its divisors is an integer number (2771901).

Almost surely, 2^28724198 is an apocalyptic number.

28724198 is a deficient number, since it is larger than the sum of its proper divisors (15626218).

28724198 is a wasteful number, since it uses less digits than its factorization.

28724198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839.

The product of its digits is 64512, while the sum is 41.

The square root of 28724198 is about 5359.4960583995. The cubic root of 28724198 is about 306.2546117312.

The spelling of 28724198 in words is "twenty-eight million, seven hundred twenty-four thousand, one hundred ninety-eight".