28777089 has 8 divisors (see below), whose sum is σ = 41857632. Its totient is φ = 17440640.

The previous prime is 28777079. The next prime is 28777097. The reversal of 28777089 is 98077782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28777089 - 2¹³ = 28768897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28777069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435984 + ... + 436049.

It is an arithmetic number, because the mean of its divisors is an integer number (5232204).

Almost surely, 2^28777089 is an apocalyptic number.

It is an amenable number.

28777089 is a deficient number, since it is larger than the sum of its proper divisors (13080543).

28777089 is a wasteful number, since it uses less digits than its factorization.

28777089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872047.

The product of its (nonzero) digits is 395136, while the sum is 48.

The square root of 28777089 is about 5364.4281149066. The cubic root of 28777089 is about 306.4424693783.

The spelling of 28777089 in words is "twenty-eight million, seven hundred seventy-seven thousand, eighty-nine".