28775270 has 32 divisors (see below), whose sum is σ = 53893728. Its totient is φ = 11052288.

The previous prime is 28775261. The next prime is 28775273. The reversal of 28775270 is 7257782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28775273) 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, 30242 + ... + 31178.

It is an arithmetic number, because the mean of its divisors is an integer number (1684179).

Almost surely, 2^28775270 is an apocalyptic number.

28775270 is a deficient number, since it is larger than the sum of its proper divisors (25118458).

28775270 is a wasteful number, since it uses less digits than its factorization.

28775270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 28775270 is about 5364.2585694577. The cubic root of 28775270 is about 306.4360124987.

It can be divided in two parts, 287 and 75270, that added together give a palindrome (75557).

The spelling of 28775270 in words is "twenty-eight million, seven hundred seventy-five thousand, two hundred seventy".