28098520 has 32 divisors (see below), whose sum is σ = 63374400. Its totient is φ = 11212288.

The previous prime is 28098509. The next prime is 28098523. The reversal of 28098520 is 2589082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28098523) 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, 28272 + ... + 29248.

It is an arithmetic number, because the mean of its divisors is an integer number (1980450).

Almost surely, 2^28098520 is an apocalyptic number.

28098520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28098520 is an abundant number, since it is smaller than the sum of its proper divisors (35275880).

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

28098520 is a wasteful number, since it uses less digits than its factorization.

28098520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 28098520 is about 5300.8037126458. The cubic root of 28098520 is about 304.0146287974.

The spelling of 28098520 in words is "twenty-eight million, ninety-eight thousand, five hundred twenty".