28783233238782 has 16 divisors (see below), whose sum is σ = 62799781612032. Its totient is φ = 8722191890520.

The previous prime is 28783233238777. The next prime is 28783233238789.

28783233238782 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 436109594527 = 28783233238782 / (2 + 8 + 7 + 8 + 3 + 2 + 3 + 3 + 2 + 3 + 8 + 7 + 8 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28783233238789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218054797198 + ... + 218054797329.

It is an arithmetic number, because the mean of its divisors is an integer number (3924986350752).

Almost surely, 2^{28783233238782} is an apocalyptic number.

28783233238782 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28783233238782 is an abundant number, since it is smaller than the sum of its proper divisors (34016548373250).

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

28783233238782 is a wasteful number, since it uses less digits than its factorization.

28783233238782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436109594543.

The product of its digits is 260112384, while the sum is 66.

The spelling of 28783233238782 in words is "twenty-eight trillion, seven hundred eighty-three billion, two hundred thirty-three million, two hundred thirty-eight thousand, seven hundred eighty-two".