100194820 has 24 divisors (see below), whose sum is σ = 229537728. Its totient is φ = 36434400.

The previous prime is 100194811. The next prime is 100194833. The reversal of 100194820 is 28491001.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227496 + ... + 227935.

It is an arithmetic number, because the mean of its divisors is an integer number (9564072).

Almost surely, 2^100194820 is an apocalyptic number.

100194820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100194820 is an abundant number, since it is smaller than the sum of its proper divisors (129342908).

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

100194820 is a wasteful number, since it uses less digits than its factorization.

100194820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455451 (or 455449 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 100194820 is about 10009.7362602618. The cubic root of 100194820 is about 464.4601126065.

The spelling of 100194820 in words is "one hundred million, one hundred ninety-four thousand, eight hundred twenty".