28877775 has 24 divisors (see below), whose sum is σ = 48330240. Its totient is φ = 15212640.

The previous prime is 28877753. The next prime is 28877809. The reversal of 28877775 is 57777882.

It is not a de Polignac number, because 28877775 - 2⁵ = 28877743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3906 + ... + 8544.

It is an arithmetic number, because the mean of its divisors is an integer number (2013760).

Almost surely, 2^28877775 is an apocalyptic number.

28877775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28877775 is a deficient number, since it is larger than the sum of its proper divisors (19452465).

28877775 is a wasteful number, since it uses less digits than its factorization.

28877775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4735 (or 4730 counting only the distinct ones).

The product of its digits is 1536640, while the sum is 51.

The square root of 28877775 is about 5373.8045182161. The cubic root of 28877775 is about 306.7994495609.

The spelling of 28877775 in words is "twenty-eight million, eight hundred seventy-seven thousand, seven hundred seventy-five".