84040400800 has 72 divisors (see below), whose sum is σ = 206639899200. Its totient is φ = 33374273280.

The previous prime is 84040400797. The next prime is 84040400839. The reversal of 84040400800 is 800404048.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266680 + ... + 489079.

It is an arithmetic number, because the mean of its divisors is an integer number (2869998600).

Almost surely, 2^84040400800 is an apocalyptic number.

84040400800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84040400800 is an abundant number, since it is smaller than the sum of its proper divisors (122599498400).

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

84040400800 is a wasteful number, since it uses less digits than its factorization.

84040400800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755918 (or 755905 counting only the distinct ones).

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

Adding to 84040400800 its reverse (800404048), we get a palindrome (84840804848).

The spelling of 84040400800 in words is "eighty-four billion, forty million, four hundred thousand, eight hundred".