84230720 has 112 divisors (see below), whose sum is σ = 236817408. Its totient is φ = 27924480.

The previous prime is 84230717. The next prime is 84230723. The reversal of 84230720 is 2703248.

It is an interprime number because it is at equal distance from previous prime (84230717) and next prime (84230723).

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 84230720.

It is not an unprimeable number, because it can be changed into a prime (84230723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68834 + ... + 70046.

Almost surely, 2^84230720 is an apocalyptic number.

84230720 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 84230720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118408704).

84230720 is an abundant number, since it is smaller than the sum of its proper divisors (152586688).

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

84230720 is a wasteful number, since it uses less digits than its factorization.

84230720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268 (or 1258 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 84230720 is about 9177.7295667284. The cubic root of 84230720 is about 438.3525167462.

Adding to 84230720 its reverse (2703248), we get a palindrome (86933968).

The spelling of 84230720 in words is "eighty-four million, two hundred thirty thousand, seven hundred twenty".