28779067460 has 72 divisors (see below), whose sum is σ = 71391995136. Its totient is φ = 9660094080.

The previous prime is 28779067453. The next prime is 28779067483. The reversal of 28779067460 is 6476097782.

It is a junction number, because it is equal to n+sod(n) for n = 28779067396 and 28779067405.

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, 349844 + ... + 424203.

It is an arithmetic number, because the mean of its divisors is an integer number (991555488).

Almost surely, 2^28779067460 is an apocalyptic number.

28779067460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28779067460 is an abundant number, since it is smaller than the sum of its proper divisors (42612927676).

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

28779067460 is a wasteful number, since it uses less digits than its factorization.

28779067460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774093 (or 774078 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 56.

The spelling of 28779067460 in words is "twenty-eight billion, seven hundred seventy-nine million, sixty-seven thousand, four hundred sixty".