84231920 has 20 divisors (see below), whose sum is σ = 195839400. Its totient is φ = 33692736.

The previous prime is 84231919. The next prime is 84231947. The reversal of 84231920 is 2913248.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526370 + ... + 526529.

It is an arithmetic number, because the mean of its divisors is an integer number (9791970).

Almost surely, 2^84231920 is an apocalyptic number.

84231920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84231920 is an abundant number, since it is smaller than the sum of its proper divisors (111607480).

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

84231920 is a wasteful number, since it uses less digits than its factorization.

84231920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052912 (or 1052906 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 84231920 is about 9177.7949421416. The cubic root of 84231920 is about 438.3545984116.

The spelling of 84231920 in words is "eighty-four million, two hundred thirty-one thousand, nine hundred twenty".