28767575 has 6 divisors (see below), whose sum is σ = 35671824. Its totient is φ = 23014040.

The previous prime is 28767569. The next prime is 28767601. The reversal of 28767575 is 57576782.

It is a happy number.

It is not a de Polignac number, because 28767575 - 2⁶ = 28767511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 575327 + ... + 575376.

It is an arithmetic number, because the mean of its divisors is an integer number (5945304).

Almost surely, 2^28767575 is an apocalyptic number.

28767575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28767575 is a deficient number, since it is larger than the sum of its proper divisors (6904249).

28767575 is a wasteful number, since it uses less digits than its factorization.

28767575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150713 (or 1150708 counting only the distinct ones).

The product of its digits is 823200, while the sum is 47.

The square root of 28767575 is about 5363.5412741956. The cubic root of 28767575 is about 306.4086946509.

The spelling of 28767575 in words is "twenty-eight million, seven hundred sixty-seven thousand, five hundred seventy-five".