28525505 has 8 divisors (see below), whose sum is σ = 34262592. Its totient is φ = 22799088.

The previous prime is 28525499. The next prime is 28525513. The reversal of 28525505 is 50552582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28525505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5492 + ... + 9338.

It is an arithmetic number, because the mean of its divisors is an integer number (4282824).

Almost surely, 2^28525505 is an apocalyptic number.

It is an amenable number.

28525505 is a deficient number, since it is larger than the sum of its proper divisors (5737087).

28525505 is a wasteful number, since it uses less digits than its factorization.

28525505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 28525505 is about 5340.9273539340. The cubic root of 28525505 is about 305.5468287437.

The spelling of 28525505 in words is "twenty-eight million, five hundred twenty-five thousand, five hundred five".