28014390625 has 63 divisors (see below), whose sum is σ = 38290115349. Its totient is φ = 20486700000.

The previous prime is 28014390623. The next prime is 28014390637. The reversal of 28014390625 is 52609341082.

The square root of 28014390625 is 167375.

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

It can be written as a sum of positive squares in 10 ways, for example, as 13142100321 + 14872290304 = 114639^2 + 121952^2 .

It is not a de Polignac number, because 28014390625 - 2¹ = 28014390623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28014390623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 271984324 + ... + 271984426.

Almost surely, 2^28014390625 is an apocalyptic number.

28014390625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28014390625 is the 167375-th square number.

28014390625 is the 83688-th centered octagonal number.

It is an amenable number.

28014390625 is a deficient number, since it is larger than the sum of its proper divisors (10275724724).

28014390625 is an frugal number, since it uses more digits than its factorization.

28014390625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 28014390625 in words is "twenty-eight billion, fourteen million, three hundred ninety thousand, six hundred twenty-five".