7028307225 has 117 divisors (see below), whose sum is σ = 13665731023. Its totient is φ = 3585455280.

The previous prime is 7028307191. The next prime is 7028307227. The reversal of 7028307225 is 5227038207.

It is a happy number.

The square root of 7028307225 is 83835.

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., 2530190601 + 4498116624 = 50301^2 + 67068^2 .

It is not a de Polignac number, because 7028307225 - 2¹⁵ = 7028274457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7028307225.

It is not an unprimeable number, because it can be changed into a prime (7028307227) by changing a digit.

It is a polite number, since it can be written in 116 ways as a sum of consecutive naturals, for example, 305578564 + ... + 305578586.

Almost surely, 2^7028307225 is an apocalyptic number.

7028307225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7028307225 is the 83835-th square number.

7028307225 is the 41918-th centered octagonal number.

It is an amenable number.

7028307225 is a deficient number, since it is larger than the sum of its proper divisors (6637423798).

7028307225 is an frugal number, since it uses more digits than its factorization.

7028307225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The cubic root of 7028307225 is about 1915.5062753937.

Multiplying 7028307225 by its sum of digits (36), we get a square (253019060100 = 503010²).

The spelling of 7028307225 in words is "seven billion, twenty-eight million, three hundred seven thousand, two hundred twenty-five".