28102998 has 64 divisors (see below), whose sum is σ = 71331840. Its totient is φ = 7168800.

The previous prime is 28102973. The next prime is 28103003. The reversal of 28102998 is 89920182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26743 + ... + 27773.

It is an arithmetic number, because the mean of its divisors is an integer number (1114560).

Almost surely, 2^28102998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28102998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35665920).

28102998 is an abundant number, since it is smaller than the sum of its proper divisors (43228842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28102998 is a wasteful number, since it uses less digits than its factorization.

28102998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 28102998 is about 5301.2260845959. The cubic root of 28102998 is about 304.0307779896.

The spelling of 28102998 in words is "twenty-eight million, one hundred two thousand, nine hundred ninety-eight".