84471780 has 96 divisors (see below), whose sum is σ = 250588800. Its totient is φ = 21224448.

The previous prime is 84471713. The next prime is 84471781. The reversal of 84471780 is 8717448.

It is not an unprimeable number, because it can be changed into a prime (84471781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74256 + ... + 75384.

It is an arithmetic number, because the mean of its divisors is an integer number (2610300).

Almost surely, 2^84471780 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 84471780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125294400).

84471780 is an abundant number, since it is smaller than the sum of its proper divisors (166117020).

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

84471780 is a wasteful number, since it uses less digits than its factorization.

84471780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 84471780 is about 9190.8530616042. The cubic root of 84471780 is about 438.7702923221.

The spelling of 84471780 in words is "eighty-four million, four hundred seventy-one thousand, seven hundred eighty".