103991780 has 12 divisors (see below), whose sum is σ = 218382780. Its totient is φ = 41596704.

The previous prime is 103991773. The next prime is 103991803. The reversal of 103991780 is 87199301.

It can be written as a sum of positive squares in 2 ways, for example, as 12559936 + 91431844 = 3544^2 + 9562^2 .

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 3 ways as a sum of consecutive naturals, for example, 2599775 + ... + 2599814.

It is an arithmetic number, because the mean of its divisors is an integer number (18198565).

Almost surely, 2^103991780 is an apocalyptic number.

103991780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103991780 is an abundant number, since it is smaller than the sum of its proper divisors (114391000).

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

103991780 is a wasteful number, since it uses less digits than its factorization.

103991780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5199598 (or 5199596 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 103991780 is about 10197.6360005641. The cubic root of 103991780 is about 470.2545474926.

The spelling of 103991780 in words is "one hundred three million, nine hundred ninety-one thousand, seven hundred eighty".