98021820 has 48 divisors (see below), whose sum is σ = 295575840. Its totient is φ = 24128256.

The previous prime is 98021797. The next prime is 98021821. The reversal of 98021820 is 2812089.

It is a super-2 number, since 2×98021820² = 19216554392224800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98021821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62055 + ... + 63614.

It is an arithmetic number, because the mean of its divisors is an integer number (6157830).

Almost surely, 2^98021820 is an apocalyptic number.

It is an amenable number.

98021820 is an abundant number, since it is smaller than the sum of its proper divisors (197554020).

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

98021820 is a wasteful number, since it uses less digits than its factorization.

98021820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125694 (or 125692 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 98021820 is about 9900.5969516994. The cubic root of 98021820 is about 461.0778442584.

The spelling of 98021820 in words is "ninety-eight million, twenty-one thousand, eight hundred twenty".