28146778734 has 32 divisors (see below), whose sum is σ = 56431178496. Its totient is φ = 9359351360.

The previous prime is 28146778727. The next prime is 28146778757. The reversal of 28146778734 is 43787764182.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5537074 + ... + 5542154.

It is an arithmetic number, because the mean of its divisors is an integer number (1763474328).

Almost surely, 2^28146778734 is an apocalyptic number.

28146778734 is an abundant number, since it is smaller than the sum of its proper divisors (28284399762).

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

28146778734 is a wasteful number, since it uses less digits than its factorization.

28146778734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7160.

The product of its digits is 12644352, while the sum is 57.

The spelling of 28146778734 in words is "twenty-eight billion, one hundred forty-six million, seven hundred seventy-eight thousand, seven hundred thirty-four".