84921798 has 32 divisors (see below), whose sum is σ = 184326912. Its totient is φ = 25927200.

The previous prime is 84921797. The next prime is 84921841. The reversal of 84921798 is 89712948.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84921797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6063 + ... + 14373.

It is an arithmetic number, because the mean of its divisors is an integer number (5760216).

Almost surely, 2^84921798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84921798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92163456).

84921798 is an abundant number, since it is smaller than the sum of its proper divisors (99405114).

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

84921798 is a wasteful number, since it uses less digits than its factorization.

84921798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8460.

The product of its digits is 290304, while the sum is 48.

The square root of 84921798 is about 9215.3023824506. The cubic root of 84921798 is about 439.5480862844.

The spelling of 84921798 in words is "eighty-four million, nine hundred twenty-one thousand, seven hundred ninety-eight".