7881380892 has 144 divisors (see below), whose sum is σ = 25930275840. Its totient is φ = 2047096800.

The previous prime is 7881380891. The next prime is 7881380909. The reversal of 7881380892 is 2980831887.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881380891) 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, 9484 + ... + 125907.

It is an arithmetic number, because the mean of its divisors is an integer number (180071360).

Almost surely, 2^7881380892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7881380892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12965137920).

7881380892 is an abundant number, since it is smaller than the sum of its proper divisors (18048894948).

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

7881380892 is a wasteful number, since it uses less digits than its factorization.

7881380892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135429 (or 135414 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 7881380892 is about 88777.1417201523. The cubic root of 7881380892 is about 1990.0658119864.

The spelling of 7881380892 in words is "seven billion, eight hundred eighty-one million, three hundred eighty thousand, eight hundred ninety-two".