28610525 has 24 divisors (see below), whose sum is σ = 36694824. Its totient is φ = 22118400.

The previous prime is 28610521. The next prime is 28610537. The reversal of 28610525 is 52501682.

It can be written as a sum of positive squares in 12 ways, for example, as 5924356 + 22686169 = 2434^2 + 4763^2 .

It is not a de Polignac number, because 28610525 - 2² = 28610521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28610521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111197 + ... + 111453.

It is an arithmetic number, because the mean of its divisors is an integer number (1528951).

Almost surely, 2^28610525 is an apocalyptic number.

28610525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28610525 is a deficient number, since it is larger than the sum of its proper divisors (8084299).

28610525 is a wasteful number, since it uses less digits than its factorization.

28610525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 28610525 is about 5348.8807240394. The cubic root of 28610525 is about 305.8500874751.

The spelling of 28610525 in words is "twenty-eight million, six hundred ten thousand, five hundred twenty-five".