840993340 has 48 divisors (see below), whose sum is σ = 1935168480. Its totient is φ = 304462080.

The previous prime is 840993337. The next prime is 840993401. The reversal of 840993340 is 43399048.

It is a junction number, because it is equal to n+sod(n) for n = 840993293 and 840993302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42034 + ... + 58726.

It is an arithmetic number, because the mean of its divisors is an integer number (40316010).

Almost surely, 2^840993340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840993340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967584240).

840993340 is an abundant number, since it is smaller than the sum of its proper divisors (1094175140).

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

840993340 is a wasteful number, since it uses less digits than its factorization.

840993340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16942 (or 16940 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 840993340 is about 28999.8851721865. The cubic root of 840993340 is about 943.9105760715.

The spelling of 840993340 in words is "eight hundred forty million, nine hundred ninety-three thousand, three hundred forty".