28077855819 has 8 divisors (see below), whose sum is σ = 40316921232. Its totient is φ = 17278680480.

The previous prime is 28077855811. The next prime is 28077855821. The reversal of 28077855819 is 91855877082.

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

It is not a de Polignac number, because 28077855819 - 2³ = 28077855811 is a prime.

It is a super-2 number, since 2×28077855819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28077855811) 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, 359972472 + ... + 359972549.

It is an arithmetic number, because the mean of its divisors is an integer number (5039615154).

Almost surely, 2^28077855819 is an apocalyptic number.

28077855819 is a deficient number, since it is larger than the sum of its proper divisors (12239065413).

28077855819 is a wasteful number, since it uses less digits than its factorization.

28077855819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719945037.

The product of its (nonzero) digits is 11289600, while the sum is 60.

The spelling of 28077855819 in words is "twenty-eight billion, seventy-seven million, eight hundred fifty-five thousand, eight hundred nineteen".