28920755 has 8 divisors (see below), whose sum is σ = 36531600. Its totient is φ = 21918816.

The previous prime is 28920719. The next prime is 28920761. The reversal of 28920755 is 55702982.

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 28920755 - 2¹⁰ = 28919731 is a prime.

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, 152120 + ... + 152309.

It is an arithmetic number, because the mean of its divisors is an integer number (4566450).

Almost surely, 2^28920755 is an apocalyptic number.

28920755 is a deficient number, since it is larger than the sum of its proper divisors (7610845).

28920755 is a wasteful number, since it uses less digits than its factorization.

28920755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304453.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 28920755 is about 5377.8020603217. The cubic root of 28920755 is about 306.9515815941.

The spelling of 28920755 in words is "twenty-eight million, nine hundred twenty thousand, seven hundred fifty-five".