28358015225 has 6 divisors (see below), whose sum is σ = 35163938910. Its totient is φ = 22686412160.

The previous prime is 28358015221. The next prime is 28358015243. The reversal of 28358015225 is 52251085382.

It can be written as a sum of positive squares in 3 ways, for example, as 8728043776 + 19629971449 = 93424^2 + 140107^2 .

It is not a de Polignac number, because 28358015225 - 2² = 28358015221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28358015221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 567160280 + ... + 567160329.

It is an arithmetic number, because the mean of its divisors is an integer number (5860656485).

Almost surely, 2^28358015225 is an apocalyptic number.

28358015225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28358015225 is a deficient number, since it is larger than the sum of its proper divisors (6805923685).

28358015225 is a wasteful number, since it uses less digits than its factorization.

28358015225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134320619 (or 1134320614 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 41.

The spelling of 28358015225 in words is "twenty-eight billion, three hundred fifty-eight million, fifteen thousand, two hundred twenty-five".