28776280412 has 24 divisors (see below), whose sum is σ = 55002084480. Its totient is φ = 13064520560.

The previous prime is 28776280339. The next prime is 28776280469. The reversal of 28776280412 is 21408267782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352838 + ... + 426669.

It is an arithmetic number, because the mean of its divisors is an integer number (2291753520).

Almost surely, 2^28776280412 is an apocalyptic number.

28776280412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28776280412 is a deficient number, since it is larger than the sum of its proper divisors (26225804068).

28776280412 is a wasteful number, since it uses less digits than its factorization.

28776280412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780361 (or 780359 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 47.

The spelling of 28776280412 in words is "twenty-eight billion, seven hundred seventy-six million, two hundred eighty thousand, four hundred twelve".