28877305 has 16 divisors (see below), whose sum is σ = 38289024. Its totient is φ = 20796160.

The previous prime is 28877297. The next prime is 28877309. The reversal of 28877305 is 50377882.

It is not a de Polignac number, because 28877305 - 2³ = 28877297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28877309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5431 + ... + 9340.

It is an arithmetic number, because the mean of its divisors is an integer number (2393064).

Almost surely, 2^28877305 is an apocalyptic number.

It is an amenable number.

28877305 is a deficient number, since it is larger than the sum of its proper divisors (9411719).

28877305 is a wasteful number, since it uses less digits than its factorization.

28877305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14816.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28877305 is about 5373.7607873816. The cubic root of 28877305 is about 306.7977851146.

Subtracting from 28877305 its product of nonzero digits (94080), we obtain a square (28783225 = 5365²).

The spelling of 28877305 in words is "twenty-eight million, eight hundred seventy-seven thousand, three hundred five".