100428165 has 12 divisors (see below), whose sum is σ = 174075564. Its totient is φ = 53561664.

The previous prime is 100428121. The next prime is 100428169. The reversal of 100428165 is 561824001.

It can be written as a sum of positive squares in 2 ways, for example, as 14884164 + 85544001 = 3858^2 + 9249^2 .

It is not a de Polignac number, because 100428165 - 2¹² = 100424069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100428169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1115824 + ... + 1115913.

It is an arithmetic number, because the mean of its divisors is an integer number (14506297).

Almost surely, 2^100428165 is an apocalyptic number.

100428165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100428165 is a deficient number, since it is larger than the sum of its proper divisors (73647399).

100428165 is a wasteful number, since it uses less digits than its factorization.

100428165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231748 (or 2231745 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 100428165 is about 10021.3853832691. The cubic root of 100428165 is about 464.8203954309.

The spelling of 100428165 in words is "one hundred million, four hundred twenty-eight thousand, one hundred sixty-five".