28552505 has 8 divisors (see below), whose sum is σ = 34401024. Its totient is φ = 22750000.

The previous prime is 28552487. The next prime is 28552541. The reversal of 28552505 is 50525582.

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

It is not a de Polignac number, because 28552505 - 2¹⁴ = 28536121 is a prime.

It is a Duffinian number.

It is a Curzon 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, 10121 + ... + 12630.

It is an arithmetic number, because the mean of its divisors is an integer number (4300128).

Almost surely, 2^28552505 is an apocalyptic number.

It is an amenable number.

28552505 is a deficient number, since it is larger than the sum of its proper divisors (5848519).

28552505 is a wasteful number, since it uses less digits than its factorization.

28552505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23007.

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

The square root of 28552505 is about 5343.4544070292. The cubic root of 28552505 is about 305.6432005448.

The spelling of 28552505 in words is "twenty-eight million, five hundred fifty-two thousand, five hundred five".