28779286755 has 8 divisors (see below), whose sum is σ = 46046858832. Its totient is φ = 15348952928.

The previous prime is 28779286747. The next prime is 28779286793. The reversal of 28779286755 is 55768297782.

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 28779286755 - 2³ = 28779286747 is a prime.

It is a super-2 number, since 2×28779286755² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959309544 + ... + 959309573.

It is an arithmetic number, because the mean of its divisors is an integer number (5755857354).

Almost surely, 2^28779286755 is an apocalyptic number.

28779286755 is a deficient number, since it is larger than the sum of its proper divisors (17267572077).

28779286755 is a wasteful number, since it uses less digits than its factorization.

28779286755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918619125.

The product of its digits is 118540800, while the sum is 66.

The spelling of 28779286755 in words is "twenty-eight billion, seven hundred seventy-nine million, two hundred eighty-six thousand, seven hundred fifty-five".