28781278212174 has 48 divisors (see below), whose sum is σ = 61153176661488. Its totient is φ = 9028621877248.

The previous prime is 28781278212103. The next prime is 28781278212257. The reversal of 28781278212174 is 47121287218782.

It is a Curzon number.

It is a congruent number.

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, 19027024 + ... + 20483900.

It is an arithmetic number, because the mean of its divisors is an integer number (1274024513781).

Almost surely, 2^{28781278212174} is an apocalyptic number.

28781278212174 is an abundant number, since it is smaller than the sum of its proper divisors (32371898449314).

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

28781278212174 is a wasteful number, since it uses less digits than its factorization.

28781278212174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468309 (or 1468292 counting only the distinct ones).

The product of its digits is 11239424, while the sum is 60.

The spelling of 28781278212174 in words is "twenty-eight trillion, seven hundred eighty-one billion, two hundred seventy-eight million, two hundred twelve thousand, one hundred seventy-four".