28255773 has 64 divisors (see below), whose sum is σ = 49674240. Its totient is φ = 13886208.

The previous prime is 28255757. The next prime is 28255807. The reversal of 28255773 is 37755282.

It is not a de Polignac number, because 28255773 - 2⁴ = 28255757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28255723) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 340390 + ... + 340472.

It is an arithmetic number, because the mean of its divisors is an integer number (776160).

Almost surely, 2^28255773 is an apocalyptic number.

It is an amenable number.

28255773 is a deficient number, since it is larger than the sum of its proper divisors (21418467).

28255773 is a wasteful number, since it uses less digits than its factorization.

28255773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178.

The product of its digits is 117600, while the sum is 39.

The square root of 28255773 is about 5315.6159567824. The cubic root of 28255773 is about 304.5807120470.

The spelling of 28255773 in words is "twenty-eight million, two hundred fifty-five thousand, seven hundred seventy-three".