840004008040 has 64 divisors (see below), whose sum is σ = 1903483411200. Its totient is φ = 333610725888.

The previous prime is 840004008037. The next prime is 840004008043. The reversal of 840004008040 is 40800400048.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (840004008037) and next prime (840004008043).

It is not an unprimeable number, because it can be changed into a prime (840004008043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5854276 + ... + 5996044.

It is an arithmetic number, because the mean of its divisors is an integer number (29741928300).

Almost surely, 2^840004008040 is an apocalyptic number.

It is an amenable number.

840004008040 is an abundant number, since it is smaller than the sum of its proper divisors (1063479403160).

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

840004008040 is a wasteful number, since it uses less digits than its factorization.

840004008040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142834 (or 142830 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 840004008040 its reverse (40800400048), we get a palindrome (880804408088).

The spelling of 840004008040 in words is "eight hundred forty billion, four million, eight thousand, forty".