28677786838 has 16 divisors (see below), whose sum is σ = 46741386240. Its totient is φ = 13146013800.

The previous prime is 28677786827. The next prime is 28677786853. The reversal of 28677786838 is 83868777682.

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, 12171058 + ... + 12173413.

It is an arithmetic number, because the mean of its divisors is an integer number (2921336640).

Almost surely, 2^28677786838 is an apocalyptic number.

28677786838 is a deficient number, since it is larger than the sum of its proper divisors (18063599402).

28677786838 is a wasteful number, since it uses less digits than its factorization.

28677786838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24344523.

The product of its digits is 303464448, while the sum is 70.

The spelling of 28677786838 in words is "twenty-eight billion, six hundred seventy-seven million, seven hundred eighty-six thousand, eight hundred thirty-eight".