123603920 has 90 divisors (see below), whose sum is σ = 318699654. Its totient is φ = 44549120.

The previous prime is 123603917. The next prime is 123603947. The reversal of 123603920 is 29306321.

It can be written as a sum of positive squares in 3 ways, for example, as 13017664 + 110586256 = 3608^2 + 10516^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123603920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1093784 + ... + 1093896.

Almost surely, 2^123603920 is an apocalyptic number.

123603920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123603920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159349827).

123603920 is an abundant number, since it is smaller than the sum of its proper divisors (195095734).

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

123603920 is a wasteful number, since it uses less digits than its factorization.

123603920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 123603920 is about 11117.7299841290. The cubic root of 123603920 is about 498.1315867607.

The spelling of 123603920 in words is "one hundred twenty-three million, six hundred three thousand, nine hundred twenty".