28919755 has 16 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 22377600.

The previous prime is 28919747. The next prime is 28919819. The reversal of 28919755 is 55791982.

It is not a de Polignac number, because 28919755 - 2³ = 28919747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40905 + ... + 41605.

It is an arithmetic number, because the mean of its divisors is an integer number (2240784).

Almost surely, 2^28919755 is an apocalyptic number.

28919755 is a deficient number, since it is larger than the sum of its proper divisors (6932789).

28919755 is a wasteful number, since it uses less digits than its factorization.

28919755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966.

The product of its digits is 226800, while the sum is 46.

The square root of 28919755 is about 5377.7090847312. The cubic root of 28919755 is about 306.9480437067.

The spelling of 28919755 in words is "twenty-eight million, nine hundred nineteen thousand, seven hundred fifty-five".