84008404840 has 32 divisors (see below), whose sum is σ = 189771996960. Its totient is φ = 33469480000.

The previous prime is 84008404787. The next prime is 84008404927. The reversal of 84008404840 is 4840480048.

It is a super-2 number, since 2×84008404840² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 84008404793 and 84008404802.

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, 4173646 + ... + 4193725.

It is an arithmetic number, because the mean of its divisors is an integer number (5930374905).

Almost surely, 2^84008404840 is an apocalyptic number.

It is an amenable number.

84008404840 is an abundant number, since it is smaller than the sum of its proper divisors (105763592120).

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

84008404840 is a wasteful number, since it uses less digits than its factorization.

84008404840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8367633 (or 8367629 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 40.

Adding to 84008404840 its reverse (4840480048), we get a palindrome (88848884888).

The spelling of 84008404840 in words is "eighty-four billion, eight million, four hundred four thousand, eight hundred forty".