840401842 has 48 divisors (see below), whose sum is σ = 1506332160. Its totient is φ = 350505792.

The previous prime is 840401839. The next prime is 840401873. The reversal of 840401842 is 248104048.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564423 + ... + 565909.

It is an arithmetic number, because the mean of its divisors is an integer number (31381920).

Almost surely, 2^840401842 is an apocalyptic number.

840401842 is a deficient number, since it is larger than the sum of its proper divisors (665930318).

840401842 is a wasteful number, since it uses less digits than its factorization.

840401842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 840401842 is about 28989.6850965994. The cubic root of 840401842 is about 943.6892298223.

The spelling of 840401842 in words is "eight hundred forty million, four hundred one thousand, eight hundred forty-two".