123604420 has 24 divisors (see below), whose sum is σ = 266586264. Its totient is φ = 48105216.

The previous prime is 123604417. The next prime is 123604421. The reversal of 123604420 is 24406321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60497284 + 63107136 = 7778^2 + 7944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123604391 and 123604400.

It is not an unprimeable number, because it can be changed into a prime (123604421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82777 + ... + 84256.

It is an arithmetic number, because the mean of its divisors is an integer number (11107761).

Almost surely, 2^123604420 is an apocalyptic number.

123604420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123604420 is an abundant number, since it is smaller than the sum of its proper divisors (142981844).

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

123604420 is a wasteful number, since it uses less digits than its factorization.

123604420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167079 (or 167077 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 123604420 is about 11117.7524707110. The cubic root of 123604420 is about 498.1322584370.

The spelling of 123604420 in words is "one hundred twenty-three million, six hundred four thousand, four hundred twenty".