28777001 has 16 divisors (see below), whose sum is σ = 33293760. Its totient is φ = 24598080.

The previous prime is 28776997. The next prime is 28777027. The reversal of 28777001 is 10077782.

It is a cyclic number.

It is not a de Polignac number, because 28777001 - 2² = 28776997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28777051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32375 + ... + 33251.

It is an arithmetic number, because the mean of its divisors is an integer number (2080860).

Almost surely, 2^28777001 is an apocalyptic number.

It is an amenable number.

28777001 is a deficient number, since it is larger than the sum of its proper divisors (4516759).

28777001 is a wasteful number, since it uses less digits than its factorization.

28777001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064.

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 28777001 is about 5364.4199127212. The cubic root of 28777001 is about 306.4421570121.

The spelling of 28777001 in words is "twenty-eight million, seven hundred seventy-seven thousand, one".