103405728 has 24 divisors (see below), whose sum is σ = 271440288. Its totient is φ = 34468544.

The previous prime is 103405727. The next prime is 103405751. The reversal of 103405728 is 827504301.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 103405695 and 103405704.

It is not an unprimeable number, because it can be changed into a prime (103405721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 538476 + ... + 538667.

It is an arithmetic number, because the mean of its divisors is an integer number (11310012).

Almost surely, 2^103405728 is an apocalyptic number.

It is an amenable number.

103405728 is an abundant number, since it is smaller than the sum of its proper divisors (168034560).

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

103405728 is a wasteful number, since it uses less digits than its factorization.

103405728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077156 (or 1077148 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 103405728 is about 10168.8607031466. The cubic root of 103405728 is about 469.3695001256.

The spelling of 103405728 in words is "one hundred three million, four hundred five thousand, seven hundred twenty-eight".