28755202878 has 32 divisors (see below), whose sum is σ = 63928051200. Its totient is φ = 9580927608.

The previous prime is 28755202871. The next prime is 28755202913. The reversal of 28755202878 is 87820255782.

28755202878 is a `hidden beast` number, since 2 + 8 + 7 + 552 + 0 + 2 + 87 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28755202871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12475 + ... + 240137.

It is an arithmetic number, because the mean of its divisors is an integer number (1997751600).

Almost surely, 2^28755202878 is an apocalyptic number.

28755202878 is an abundant number, since it is smaller than the sum of its proper divisors (35172848322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28755202878 is a wasteful number, since it uses less digits than its factorization.

28755202878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230013 (or 230007 counting only the distinct ones).

The product of its (nonzero) digits is 5017600, while the sum is 54.

The spelling of 28755202878 in words is "twenty-eight billion, seven hundred fifty-five million, two hundred two thousand, eight hundred seventy-eight".