28535308287878 has 32 divisors (see below), whose sum is σ = 50496256247808. Its totient is φ = 11834780918400.

The previous prime is 28535308287869. The next prime is 28535308287881. The reversal of 28535308287878 is 87878280353582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41718398 + ... + 42396878.

It is an arithmetic number, because the mean of its divisors is an integer number (1578008007744).

Almost surely, 2^{28535308287878} is an apocalyptic number.

28535308287878 is a deficient number, since it is larger than the sum of its proper divisors (21960947959930).

28535308287878 is a wasteful number, since it uses less digits than its factorization.

28535308287878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775428.

The product of its (nonzero) digits is 1445068800, while the sum is 74.

The spelling of 28535308287878 in words is "twenty-eight trillion, five hundred thirty-five billion, three hundred eight million, two hundred eighty-seven thousand, eight hundred seventy-eight".