103644020 has 12 divisors (see below), whose sum is σ = 217652484. Its totient is φ = 41457600.

The previous prime is 103643987. The next prime is 103644029. The reversal of 103644020 is 20446301.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 81252196 + 22391824 = 9014^2 + 4732^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5182201 = 103644020 / (1 + 0 + 3 + 6 + 4 + 4 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 103643983 and 103644001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103644029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2591081 + ... + 2591120.

It is an arithmetic number, because the mean of its divisors is an integer number (18137707).

Almost surely, 2^103644020 is an apocalyptic number.

103644020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103644020 is an abundant number, since it is smaller than the sum of its proper divisors (114008464).

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

103644020 is a wasteful number, since it uses less digits than its factorization.

103644020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5182210 (or 5182208 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 103644020 is about 10180.5707109179. The cubic root of 103644020 is about 469.7297676985.

The spelling of 103644020 in words is "one hundred three million, six hundred forty-four thousand, twenty".