2783431782 has 64 divisors (see below), whose sum is σ = 6557644800. Its totient is φ = 873594720.

The previous prime is 2783431741. The next prime is 2783431787. The reversal of 2783431782 is 2871343872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2783431787) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39469 + ... + 84407.

It is an arithmetic number, because the mean of its divisors is an integer number (102463200).

Almost surely, 2^2783431782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2783431782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3278822400).

2783431782 is an abundant number, since it is smaller than the sum of its proper divisors (3774213018).

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

2783431782 is a wasteful number, since it uses less digits than its factorization.

2783431782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45018 (or 45012 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 2783431782 is about 52758.2389963880. The cubic root of 2783431782 is about 1406.6742168334.

The spelling of 2783431782 in words is "two billion, seven hundred eighty-three million, four hundred thirty-one thousand, seven hundred eighty-two".