840401164 has 24 divisors (see below), whose sum is σ = 1486983680. Its totient is φ = 415570176.

The previous prime is 840401161. The next prime is 840401173. The reversal of 840401164 is 461104048.

It is not an unprimeable number, because it can be changed into a prime (840401161) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 168742 + ... + 173650.

Almost surely, 2^840401164 is an apocalyptic number.

It is an amenable number.

840401164 is a deficient number, since it is larger than the sum of its proper divisors (646582516).

840401164 is a wasteful number, since it uses less digits than its factorization.

840401164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377 (or 5375 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 840401164 is about 28989.6734027826. The cubic root of 840401164 is about 943.6889760463.

The spelling of 840401164 in words is "eight hundred forty million, four hundred one thousand, one hundred sixty-four".