98765820 has 72 divisors (see below), whose sum is σ = 301247856. Its totient is φ = 26191872.

The previous prime is 98765813. The next prime is 98765833. The reversal of 98765820 is 2856789.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33319 + ... + 36161.

It is an arithmetic number, because the mean of its divisors is an integer number (4183998).

Almost surely, 2^98765820 is an apocalyptic number.

98765820 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 98765820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150623928).

98765820 is an abundant number, since it is smaller than the sum of its proper divisors (202482036).

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

98765820 is a wasteful number, since it uses less digits than its factorization.

98765820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051 (or 3046 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 98765820 is about 9938.0994158843. The cubic root of 98765820 is about 462.2414547166.

The spelling of 98765820 in words is "ninety-eight million, seven hundred sixty-five thousand, eight hundred twenty".