7877287782 has 96 divisors (see below), whose sum is σ = 21064051008. Its totient is φ = 2071795968.

The previous prime is 7877287711. The next prime is 7877287783. The reversal of 7877287782 is 2877827787.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7877287783) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 604528 + ... + 617420.

It is an arithmetic number, because the mean of its divisors is an integer number (219417198).

Almost surely, 2^7877287782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7877287782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10532025504).

7877287782 is an abundant number, since it is smaller than the sum of its proper divisors (13186763226).

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

7877287782 is a wasteful number, since it uses less digits than its factorization.

7877287782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13294 (or 13291 counting only the distinct ones).

The product of its digits is 34420736, while the sum is 63.

The square root of 7877287782 is about 88754.0860017160. The cubic root of 7877287782 is about 1989.7212459391.

The spelling of 7877287782 in words is "seven billion, eight hundred seventy-seven million, two hundred eighty-seven thousand, seven hundred eighty-two".