123645408 has 24 divisors (see below), whose sum is σ = 324569448. Its totient is φ = 41215104.

The previous prime is 123645383. The next prime is 123645413. The reversal of 123645408 is 804546321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643891 + ... + 644082.

It is an arithmetic number, because the mean of its divisors is an integer number (13523727).

Almost surely, 2^123645408 is an apocalyptic number.

It is an amenable number.

123645408 is an abundant number, since it is smaller than the sum of its proper divisors (200924040).

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

123645408 is a wasteful number, since it uses less digits than its factorization.

123645408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287986 (or 1287978 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 123645408 is about 11119.5956761026. The cubic root of 123645408 is about 498.1873136110.

The spelling of 123645408 in words is "one hundred twenty-three million, six hundred forty-five thousand, four hundred eight".