840648942 has 160 divisors (see below), whose sum is σ = 2271532032. Its totient is φ = 227183616.

The previous prime is 840648899. The next prime is 840648959. The reversal of 840648942 is 249846048.

840648942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4355598 + ... + 4355790.

Almost surely, 2^840648942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840648942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135766016).

840648942 is an abundant number, since it is smaller than the sum of its proper divisors (1430883090).

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

840648942 is a wasteful number, since it uses less digits than its factorization.

840648942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 840648942 is about 28993.9466440842. The cubic root of 840648942 is about 943.7817104852.

The spelling of 840648942 in words is "eight hundred forty million, six hundred forty-eight thousand, nine hundred forty-two".