84783247840 has 96 divisors (see below), whose sum is σ = 201412552320. Its totient is φ = 33725497344.

The previous prime is 84783247837. The next prime is 84783247867. The reversal of 84783247840 is 4874238748.

It is a super-2 number, since 2×84783247840² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28964457 + ... + 28967383.

It is an arithmetic number, because the mean of its divisors is an integer number (2098047420).

Almost surely, 2^84783247840 is an apocalyptic number.

84783247840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84783247840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100706276160).

84783247840 is an abundant number, since it is smaller than the sum of its proper divisors (116629304480).

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

84783247840 is a wasteful number, since it uses less digits than its factorization.

84783247840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3884 (or 3876 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 55.

The spelling of 84783247840 in words is "eighty-four billion, seven hundred eighty-three million, two hundred forty-seven thousand, eight hundred forty".