28475937601225 has 27 divisors (see below), whose sum is σ = 35586131437831. Its totient is φ = 22604076357200.

The previous prime is 28475937601217. The next prime is 28475937601303. The reversal of 28475937601225 is 52210673957482.

It is a happy number.

The square root of 28475937601225 is 5336285.

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., 10251337536441 + 18224600064784 = 3201771^2 + 4269028^2 .

It is not a de Polignac number, because 28475937601225 - 2³ = 28475937601217 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, 3495262602 + ... + 3495270748.

It is a 1-persistent number, because it is pandigital, but 2⋅28475937601225 = 56951875202450 is not.

Almost surely, 2^{28475937601225} is an apocalyptic number.

28475937601225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28475937601225 is the 5336285-th square number.

28475937601225 is the 2668143-rd centered octagonal number.

It is an amenable number.

28475937601225 is a deficient number, since it is larger than the sum of its proper divisors (7110193836606).

28475937601225 is an frugal number, since it uses more digits than its factorization.

28475937601225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16566 (or 8283 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 28475937601225 in words is "twenty-eight trillion, four hundred seventy-five billion, nine hundred thirty-seven million, six hundred one thousand, two hundred twenty-five".