28135030225 has 9 divisors (see below), whose sum is σ = 34888477467. Its totient is φ = 22507353240.

The previous prime is 28135030219. The next prime is 28135030241. The reversal of 28135030225 is 52203053182.

The square root of 28135030225 is 167735.

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

It can be written as a sum of positive squares in only one way, i.e., 10128610881 + 18006419344 = 100641^2 + 134188^2 .

It is not a de Polignac number, because 28135030225 - 2¹³ = 28135022033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 821902 + ... + 855448.

Almost surely, 2^28135030225 is an apocalyptic number.

28135030225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28135030225 is the 167735-th square number.

28135030225 is the 83868-th centered octagonal number.

It is an amenable number.

28135030225 is a deficient number, since it is larger than the sum of its proper divisors (6753447242).

28135030225 is an frugal number, since it uses more digits than its factorization.

28135030225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67104 (or 33552 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Multiplying 28135030225 by its product of nonzero digits (14400), we get a square (405144435240000 = 20128200²).

The spelling of 28135030225 in words is "twenty-eight billion, one hundred thirty-five million, thirty thousand, two hundred twenty-five".