842585840 has 40 divisors (see below), whose sum is σ = 1960240608. Its totient is φ = 336823040.

The previous prime is 842585831. The next prime is 842585857. The reversal of 842585840 is 48585248.

842585840 is digitally balanced in base 2, 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 (40).

It is a junction number, because it is equal to n+sod(n) for n = 842585791 and 842585800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213485 + ... + 217395.

Almost surely, 2^842585840 is an apocalyptic number.

842585840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

842585840 is an abundant number, since it is smaller than the sum of its proper divisors (1117654768).

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

842585840 is a wasteful number, since it uses less digits than its factorization.

842585840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6617 (or 6611 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 44.

The square root of 842585840 is about 29027.3291916428. The cubic root of 842585840 is about 944.5059948916.

The spelling of 842585840 in words is "eight hundred forty-two million, five hundred eighty-five thousand, eight hundred forty".