840442008 has 64 divisors (see below), whose sum is σ = 2425086720. Its totient is φ = 237744000.

The previous prime is 840441983. The next prime is 840442027. The reversal of 840442008 is 800244048.

It is a super-2 number, since 2×840442008² = 1412685537622144128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7798 + ... + 41733.

It is an arithmetic number, because the mean of its divisors is an integer number (37891980).

Almost surely, 2^840442008 is an apocalyptic number.

It is an amenable number.

840442008 is an abundant number, since it is smaller than the sum of its proper divisors (1584644712).

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

840442008 is a wasteful number, since it uses less digits than its factorization.

840442008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49648 (or 49644 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 840442008 is about 28990.3778519701. The cubic root of 840442008 is about 943.7042637485.

The spelling of 840442008 in words is "eight hundred forty million, four hundred forty-two thousand, eight".