28098140625 has 105 divisors (see below), whose sum is σ = 52821023101. Its totient is φ = 14885100000.

The previous prime is 28098140599. The next prime is 28098140639. The reversal of 28098140625 is 52604189082.

The square root of 28098140625 is 167625.

It is a perfect power (a square), and thus also a powerful number.

28098140625 is a `hidden beast` number, since 2 + 8 + 0 + 9 + 8 + 14 + 0 + 625 = 666.

It can be written as a sum of positive squares in 10 ways, for example, as 11912194449 + 16185946176 = 109143^2 + 127224^2 .

It is not a de Polignac number, because 28098140625 - 2⁵ = 28098140593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 104 ways as a sum of consecutive naturals, for example, 188578051 + ... + 188578199.

Almost surely, 2^28098140625 is an apocalyptic number.

28098140625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28098140625 is the 167625-th square number.

28098140625 is the 83813-rd centered octagonal number.

It is an amenable number.

28098140625 is a deficient number, since it is larger than the sum of its proper divisors (24722882476).

28098140625 is an frugal number, since it uses more digits than its factorization.

28098140625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 28098140625 in words is "twenty-eight billion, ninety-eight million, one hundred forty thousand, six hundred twenty-five".