28778048226 has 48 divisors (see below), whose sum is σ = 65881880064. Its totient is φ = 9411680304.

The previous prime is 28778048213. The next prime is 28778048269. The reversal of 28778048226 is 62284087782.

28778048226 is a `hidden beast` number, since 2 + 87 + 7 + 80 + 482 + 2 + 6 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 532866 + ... + 584381.

It is an arithmetic number, because the mean of its divisors is an integer number (1372539168).

Almost surely, 2^28778048226 is an apocalyptic number.

28778048226 is an abundant number, since it is smaller than the sum of its proper divisors (37103831838).

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

28778048226 is a wasteful number, since it uses less digits than its factorization.

28778048226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117317 (or 1117305 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 54.

The spelling of 28778048226 in words is "twenty-eight billion, seven hundred seventy-eight million, forty-eight thousand, two hundred twenty-six".