840041440 has 48 divisors (see below), whose sum is σ = 2268114912. Its totient is φ = 288013824.

The previous prime is 840041407. The next prime is 840041479. The reversal of 840041440 is 44140048.

It is a happy number.

It is a congruent number.

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, 373899 + ... + 376138.

It is an arithmetic number, because the mean of its divisors is an integer number (47252394).

Almost surely, 2^840041440 is an apocalyptic number.

840041440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

840041440 is an abundant number, since it is smaller than the sum of its proper divisors (1428073472).

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

840041440 is a wasteful number, since it uses less digits than its factorization.

840041440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750059 (or 750051 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 840041440 is about 28983.4683914814. The cubic root of 840041440 is about 943.5543117795.

Adding to 840041440 its reverse (44140048), we get a palindrome (884181488).

The spelling of 840041440 in words is "eight hundred forty million, forty-one thousand, four hundred forty".