842281780 has 96 divisors (see below), whose sum is σ = 1940520960. Its totient is φ = 305907840.

The previous prime is 842281763. The next prime is 842281831. The reversal of 842281780 is 87182248.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1495779 + ... + 1496341.

It is an arithmetic number, because the mean of its divisors is an integer number (20213760).

Almost surely, 2^842281780 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 842281780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970260480).

842281780 is an abundant number, since it is smaller than the sum of its proper divisors (1098239180).

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

842281780 is a wasteful number, since it uses less digits than its factorization.

842281780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 842281780 is about 29022.0912409840. The cubic root of 842281780 is about 944.3923680731.

The spelling of 842281780 in words is "eight hundred forty-two million, two hundred eighty-one thousand, seven hundred eighty".