28783610811 has 6 divisors (see below), whose sum is σ = 41576326740. Its totient is φ = 19189073868.

The previous prime is 28783610783. The next prime is 28783610819. The reversal of 28783610811 is 11801638782.

It is a happy number.

28783610811 is a `hidden beast` number, since 28 + 7 + 8 + 3 + 610 + 8 + 1 + 1 = 666.

It is not a de Polignac number, because 28783610811 - 2²¹ = 28781513659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28783610819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1599089481 + ... + 1599089498.

It is an arithmetic number, because the mean of its divisors is an integer number (6929387790).

Almost surely, 2^28783610811 is an apocalyptic number.

28783610811 is a deficient number, since it is larger than the sum of its proper divisors (12792715929).

28783610811 is a wasteful number, since it uses less digits than its factorization.

28783610811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198178985 (or 3198178982 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 28783610811 in words is "twenty-eight billion, seven hundred eighty-three million, six hundred ten thousand, eight hundred eleven".