84830477992 has 64 divisors (see below), whose sum is σ = 177354293760. Its totient is φ = 37774598400.

The previous prime is 84830477957. The next prime is 84830477993. The reversal of 84830477992 is 29977403848.

It is a self number, because there is not a number n which added to its sum of digits gives 84830477992.

It is not an unprimeable number, because it can be changed into a prime (84830477993) 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, 1027398 + ... + 1106890.

It is an arithmetic number, because the mean of its divisors is an integer number (2771160840).

Almost surely, 2^84830477992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84830477992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88677146880).

84830477992 is an abundant number, since it is smaller than the sum of its proper divisors (92523815768).

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

84830477992 is a wasteful number, since it uses less digits than its factorization.

84830477992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79874 (or 79870 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 84830477992 in words is "eighty-four billion, eight hundred thirty million, four hundred seventy-seven thousand, nine hundred ninety-two".