100820808 has 64 divisors (see below), whose sum is σ = 305524800. Its totient is φ = 30551040.

The previous prime is 100820807. The next prime is 100820809. The reversal of 100820808 is 808028001.

It is an interprime number because it is at equal distance from previous prime (100820807) and next prime (100820809).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (100820803) 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, 18841 + ... + 23592.

It is an arithmetic number, because the mean of its divisors is an integer number (4773825).

Almost surely, 2^100820808 is an apocalyptic number.

100820808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

100820808 is an abundant number, since it is smaller than the sum of its proper divisors (204703992).

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

100820808 is a wasteful number, since it uses less digits than its factorization.

100820808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42459 (or 42449 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 100820808 is about 10040.9565281401. The cubic root of 100820808 is about 465.4253755819.

Adding to 100820808 its reverse (808028001), we get a palindrome (908848809).

The spelling of 100820808 in words is "one hundred million, eight hundred twenty thousand, eight hundred eight".