840543404 has 24 divisors (see below), whose sum is σ = 1491775488. Its totient is φ = 414363600.

The previous prime is 840543343. The next prime is 840543421. The reversal of 840543404 is 404345048.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77729 + ... + 87879.

It is an arithmetic number, because the mean of its divisors is an integer number (62157312).

Almost surely, 2^840543404 is an apocalyptic number.

It is an amenable number.

840543404 is a deficient number, since it is larger than the sum of its proper divisors (651232084).

840543404 is a wasteful number, since it uses less digits than its factorization.

840543404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10445 (or 10443 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

The square root of 840543404 is about 28992.1265863682. The cubic root of 840543404 is about 943.7422136164.

The spelling of 840543404 in words is "eight hundred forty million, five hundred forty-three thousand, four hundred four".