840285432 has 48 divisors (see below), whose sum is σ = 2600885040. Its totient is φ = 240081408.

The previous prime is 840285421. The next prime is 840285437. The reversal of 840285432 is 234582048.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840285437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 833113 + ... + 834120.

It is an arithmetic number, because the mean of its divisors is an integer number (54185105).

Almost surely, 2^840285432 is an apocalyptic number.

It is an amenable number.

840285432 is an abundant number, since it is smaller than the sum of its proper divisors (1760599608).

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

840285432 is a wasteful number, since it uses less digits than its factorization.

840285432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667252 (or 1667245 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 840285432 is about 28987.6772439601. The cubic root of 840285432 is about 943.6456554549.

The spelling of 840285432 in words is "eight hundred forty million, two hundred eighty-five thousand, four hundred thirty-two".