84423270 has 64 divisors (see below), whose sum is σ = 219098880. Its totient is φ = 20746368.

The previous prime is 84423257. The next prime is 84423293. The reversal of 84423270 is 7232448.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19089 + ... + 23091.

It is an arithmetic number, because the mean of its divisors is an integer number (3423420).

Almost surely, 2^84423270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84423270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109549440).

84423270 is an abundant number, since it is smaller than the sum of its proper divisors (134675610).

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

84423270 is a wasteful number, since it uses less digits than its factorization.

84423270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 84423270 is about 9188.2136457529. The cubic root of 84423270 is about 438.6862846901.

The spelling of 84423270 in words is "eighty-four million, four hundred twenty-three thousand, two hundred seventy".