9100820 has 24 divisors (see below), whose sum is σ = 19267584. Its totient is φ = 3610656.

The previous prime is 9100813. The next prime is 9100843. The reversal of 9100820 is 280019.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 9100792 and 9100801.

It is a congruent number.

It is an unprimeable number.

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, 749 + ... + 4331.

It is an arithmetic number, because the mean of its divisors is an integer number (802816).

Almost surely, 2^9100820 is an apocalyptic number.

It is an amenable number.

9100820 is an abundant number, since it is smaller than the sum of its proper divisors (10166764).

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

9100820 is a wasteful number, since it uses less digits than its factorization.

9100820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719 (or 3717 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 9100820 is about 3016.7565364146. The cubic root of 9100820 is about 208.7822186039.

Adding to 9100820 its reverse (280019), we get a palindrome (9380839).

The spelling of 9100820 in words is "nine million, one hundred thousand, eight hundred twenty".