28888779 has 8 divisors (see below), whose sum is σ = 38800080. Its totient is φ = 19118336.

The previous prime is 28888771. The next prime is 28888841. The reversal of 28888779 is 97788882.

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 28888779 - 2³ = 28888771 is a prime.

It is a super-2 number, since 2×28888779² = 1669123104221682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28888771) 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, 34734 + ... + 35555.

It is an arithmetic number, because the mean of its divisors is an integer number (4850010).

Almost surely, 2^28888779 is an apocalyptic number.

28888779 is a deficient number, since it is larger than the sum of its proper divisors (9911301).

28888779 is a wasteful number, since it uses less digits than its factorization.

28888779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70429.

The product of its digits is 3612672, while the sum is 57.

The square root of 28888779 is about 5374.8282763266. The cubic root of 28888779 is about 306.8384136942.

The spelling of 28888779 in words is "twenty-eight million, eight hundred eighty-eight thousand, seven hundred seventy-nine".