28623505 has 8 divisors (see below), whose sum is σ = 34440192. Its totient is φ = 22837488.

The previous prime is 28623499. The next prime is 28623527. The reversal of 28623505 is 50532682.

It is a happy number.

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 28623505 - 2⁵ = 28623473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5559 + ... + 9388.

It is an arithmetic number, because the mean of its divisors is an integer number (4305024).

Almost surely, 2^28623505 is an apocalyptic number.

It is an amenable number.

28623505 is a deficient number, since it is larger than the sum of its proper divisors (5816687).

28623505 is a wasteful number, since it uses less digits than its factorization.

28623505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15335.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 28623505 is about 5350.0939244092. The cubic root of 28623505 is about 305.8963330896.

The spelling of 28623505 in words is "twenty-eight million, six hundred twenty-three thousand, five hundred five".