28874505625 has 45 divisors (see below), whose sum is σ = 42015723321. Its totient is φ = 19779270000.

The previous prime is 28874505623. The next prime is 28874505641. The reversal of 28874505625 is 52650547882.

The square root of 28874505625 is 169925.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2263761241 + 26610744384 = 47579^2 + 163128^2 .

It is not a de Polignac number, because 28874505625 - 2¹ = 28874505623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28874505623) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 29736390 + ... + 29737360.

Almost surely, 2^28874505625 is an apocalyptic number.

28874505625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28874505625 is the 169925-th square number.

28874505625 is the 84963-rd centered octagonal number.

It is an amenable number.

28874505625 is a deficient number, since it is larger than the sum of its proper divisors (13141217696).

28874505625 is an frugal number, since it uses more digits than its factorization.

28874505625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 52.

The spelling of 28874505625 in words is "twenty-eight billion, eight hundred seventy-four million, five hundred five thousand, six hundred twenty-five".