840404460 has 48 divisors (see below), whose sum is σ = 2689295616. Its totient is φ = 192092352.

The previous prime is 840404459. The next prime is 840404471. The reversal of 840404460 is 64404048.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000062 + ... + 1000901.

It is an arithmetic number, because the mean of its divisors is an integer number (56026992).

Almost surely, 2^840404460 is an apocalyptic number.

It is an amenable number.

840404460 is an abundant number, since it is smaller than the sum of its proper divisors (1848891156).

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

840404460 is a wasteful number, since it uses less digits than its factorization.

840404460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000982 (or 2000980 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 840404460 is about 28989.7302505560. The cubic root of 840404460 is about 943.6902097408.

The spelling of 840404460 in words is "eight hundred forty million, four hundred four thousand, four hundred sixty".