84219954 has 64 divisors (see below), whose sum is σ = 210249984. Its totient is φ = 21897216.

The previous prime is 84219953. The next prime is 84219979. The reversal of 84219954 is 45991248.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (84219953) 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, 38802 + ... + 40914.

It is an arithmetic number, because the mean of its divisors is an integer number (3285156).

Almost surely, 2^84219954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84219954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105124992).

84219954 is an abundant number, since it is smaller than the sum of its proper divisors (126030030).

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

84219954 is a wasteful number, since it uses less digits than its factorization.

84219954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211.

The product of its digits is 103680, while the sum is 42.

The square root of 84219954 is about 9177.1430194805. The cubic root of 84219954 is about 438.3338398538. Note that the first 3 decimals are identical.

The spelling of 84219954 in words is "eighty-four million, two hundred nineteen thousand, nine hundred fifty-four".