28620525 has 12 divisors (see below), whose sum is σ = 47319392. Its totient is φ = 15264240.

The previous prime is 28620521. The next prime is 28620541. The reversal of 28620525 is 52502682.

It is not a de Polignac number, because 28620525 - 2² = 28620521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28620492 and 28620501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28620521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190729 + ... + 190878.

Almost surely, 2^28620525 is an apocalyptic number.

28620525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28620525 is a deficient number, since it is larger than the sum of its proper divisors (18698867).

28620525 is a wasteful number, since it uses less digits than its factorization.

28620525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381620 (or 381615 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 28620525 is about 5349.8154173766. The cubic root of 28620525 is about 305.8857170742.

The spelling of 28620525 in words is "twenty-eight million, six hundred twenty thousand, five hundred twenty-five".