840008840 has 32 divisors (see below), whose sum is σ = 2061840960. Its totient is φ = 305457600.

The previous prime is 840008839. The next prime is 840008843. The reversal of 840008840 is 48800048.

It is a super-2 number, since 2×840008840² = 1411229702556291200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 840008797 and 840008806.

It is not an unprimeable number, because it can be changed into a prime (840008843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954116 + ... + 954995.

It is an arithmetic number, because the mean of its divisors is an integer number (64432530).

Almost surely, 2^840008840 is an apocalyptic number.

It is an amenable number.

840008840 is an abundant number, since it is smaller than the sum of its proper divisors (1221832120).

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

840008840 is a wasteful number, since it uses less digits than its factorization.

840008840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909133 (or 1909129 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 840008840 is about 28982.9059964663. The cubic root of 840008840 is about 943.5421059259.

Adding to 840008840 its reverse (48800048), we get a palindrome (888808888).

The spelling of 840008840 in words is "eight hundred forty million, eight thousand, eight hundred forty".