28622505 has 8 divisors (see below), whose sum is σ = 45796032. Its totient is φ = 15265328.

The previous prime is 28622471. The next prime is 28622519. The reversal of 28622505 is 50522682.

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

It is a cyclic number.

It is not a de Polignac number, because 28622505 - 2⁸ = 28622249 is a prime.

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, 954069 + ... + 954098.

It is an arithmetic number, because the mean of its divisors is an integer number (5724504).

Almost surely, 2^28622505 is an apocalyptic number.

It is an amenable number.

28622505 is a deficient number, since it is larger than the sum of its proper divisors (17173527).

28622505 is a wasteful number, since it uses less digits than its factorization.

28622505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908175.

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

The square root of 28622505 is about 5350.0004672897. Note that the first 3 decimals coincide. The cubic root of 28622505 is about 305.8927707504.

It can be divided in two parts, 286 and 22505, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 28622505 in words is "twenty-eight million, six hundred twenty-two thousand, five hundred five".