842037840 has 120 divisors (see below), whose sum is σ = 3231840768. Its totient is φ = 192464640.

The previous prime is 842037821. The next prime is 842037857. The reversal of 842037840 is 48730248.

842037840 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 842037795 and 842037804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78496 + ... + 88575.

Almost surely, 2^842037840 is an apocalyptic number.

842037840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

842037840 is an abundant number, since it is smaller than the sum of its proper divisors (2389802928).

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

842037840 is a wasteful number, since it uses less digits than its factorization.

842037840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167097 (or 167088 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 842037840 is about 29017.8882760273. Note that the first 3 decimals coincide. The cubic root of 842037840 is about 944.3011882472.

The spelling of 842037840 in words is "eight hundred forty-two million, thirty-seven thousand, eight hundred forty".