842043840 has 224 divisors, whose sum is σ = 2945099520. Its totient is φ = 203822080.

The previous prime is 842043827. The next prime is 842043871. The reversal of 842043840 is 48340248.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1277431 + ... + 1278089.

Almost surely, 2^842043840 is an apocalyptic number.

842043840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842043840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472549760).

842043840 is an abundant number, since it is smaller than the sum of its proper divisors (2103055680).

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

842043840 is a wasteful number, since it uses less digits than its factorization.

842043840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 842043840 is about 29017.9916603476. The cubic root of 842043840 is about 944.3034311368.

The spelling of 842043840 in words is "eight hundred forty-two million, forty-three thousand, eight hundred forty".