840401382 has 64 divisors (see below), whose sum is σ = 1804032000. Its totient is φ = 260413440.

The previous prime is 840401381. The next prime is 840401389. The reversal of 840401382 is 283104048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840401381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1871494 + ... + 1871942.

It is an arithmetic number, because the mean of its divisors is an integer number (28188000).

Almost surely, 2^840401382 is an apocalyptic number.

840401382 is an abundant number, since it is smaller than the sum of its proper divisors (963630618).

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

840401382 is a wasteful number, since it uses less digits than its factorization.

840401382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 840401382 is about 28989.6771627419. The cubic root of 840401382 is about 943.6890576439.

The spelling of 840401382 in words is "eight hundred forty million, four hundred one thousand, three hundred eighty-two".