28064462225 has 12 divisors (see below), whose sum is σ = 35001094236. Its totient is φ = 22321788480.

The previous prime is 28064462201. The next prime is 28064462281. The reversal of 28064462225 is 52226446082.

It can be written as a sum of positive squares in 6 ways, for example, as 18931201 + 28045531024 = 4351^2 + 167468^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28064462225 is a prime.

It is a super-2 number, since 2×28064462225² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3240122 + ... + 3248771.

It is an arithmetic number, because the mean of its divisors is an integer number (2916757853).

Almost surely, 2^28064462225 is an apocalyptic number.

28064462225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28064462225 is a deficient number, since it is larger than the sum of its proper divisors (6936632011).

28064462225 is a wasteful number, since it uses less digits than its factorization.

28064462225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489076 (or 6489071 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 41.

The spelling of 28064462225 in words is "twenty-eight billion, sixty-four million, four hundred sixty-two thousand, two hundred twenty-five".