84158420 has 24 divisors (see below), whose sum is σ = 177666048. Its totient is φ = 33485600.

The previous prime is 84158419. The next prime is 84158423. The reversal of 84158420 is 2485148.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84158423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7196 + ... + 14835.

It is an arithmetic number, because the mean of its divisors is an integer number (7402752).

Almost surely, 2^84158420 is an apocalyptic number.

It is an amenable number.

84158420 is an abundant number, since it is smaller than the sum of its proper divisors (93507628).

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

84158420 is a wasteful number, since it uses less digits than its factorization.

84158420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22231 (or 22229 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 84158420 is about 9173.7898384474. The cubic root of 84158420 is about 438.2270599088.

The spelling of 84158420 in words is "eighty-four million, one hundred fifty-eight thousand, four hundred twenty".