28607525 has 6 divisors (see below), whose sum is σ = 35473362. Its totient is φ = 22886000.

The previous prime is 28607519. The next prime is 28607563. The reversal of 28607525 is 52570682.

It can be written as a sum of positive squares in 3 ways, for example, as 1223236 + 27384289 = 1106^2 + 5233^2 .

It is not a de Polignac number, because 28607525 - 2¹² = 28603429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572126 + ... + 572175.

It is an arithmetic number, because the mean of its divisors is an integer number (5912227).

Almost surely, 2^28607525 is an apocalyptic number.

28607525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28607525 is a deficient number, since it is larger than the sum of its proper divisors (6865837).

28607525 is a wasteful number, since it uses less digits than its factorization.

28607525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144311 (or 1144306 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 28607525 is about 5348.6002841865. The cubic root of 28607525 is about 305.8393969765.

The spelling of 28607525 in words is "twenty-eight million, six hundred seven thousand, five hundred twenty-five".