28777075 has 6 divisors (see below), whose sum is σ = 35683604. Its totient is φ = 23021640.

The previous prime is 28777069. The next prime is 28777079. The reversal of 28777075 is 57077782.

It is not a de Polignac number, because 28777075 - 2⁵ = 28777043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28777079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 575517 + ... + 575566.

Almost surely, 2^28777075 is an apocalyptic number.

28777075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28777075 is a deficient number, since it is larger than the sum of its proper divisors (6906529).

28777075 is a wasteful number, since it uses less digits than its factorization.

28777075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151093 (or 1151088 counting only the distinct ones).

The product of its (nonzero) digits is 192080, while the sum is 43.

The square root of 28777075 is about 5364.4268100143. The cubic root of 28777075 is about 306.4424196837.

The spelling of 28777075 in words is "twenty-eight million, seven hundred seventy-seven thousand, seventy-five".