28454629225 has 27 divisors (see below), whose sum is σ = 38795603511. Its totient is φ = 20687528400.

The previous prime is 28454629199. The next prime is 28454629243. The reversal of 28454629225 is 52292645482.

The square root of 28454629225 is 168685.

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., 10243666521 + 18210962704 = 101211^2 + 134948^2 .

It is not a de Polignac number, because 28454629225 - 2¹⁹ = 28454104937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9276142 + ... + 9279208.

Almost surely, 2^28454629225 is an apocalyptic number.

28454629225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28454629225 is the 168685-th square number.

28454629225 is the 84343-rd centered octagonal number.

It is an amenable number.

28454629225 is a deficient number, since it is larger than the sum of its proper divisors (10340974286).

28454629225 is an frugal number, since it uses more digits than its factorization.

28454629225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6166 (or 3083 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 49.

Multiplying 28454629225 by its sum of digits (49), we get a square (1394276832025 = 1180795²).

The spelling of 28454629225 in words is "twenty-eight billion, four hundred fifty-four million, six hundred twenty-nine thousand, two hundred twenty-five".