123639480 has 128 divisors (see below), whose sum is σ = 414720000. Its totient is φ = 32764032.

The previous prime is 123639437. The next prime is 123639493. The reversal of 123639480 is 84936321.

123639480 is a `hidden beast` number, since 12 + 3 + 639 + 4 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257881 + ... + 258359.

It is an arithmetic number, because the mean of its divisors is an integer number (3240000).

Almost surely, 2^123639480 is an apocalyptic number.

123639480 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 123639480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207360000).

123639480 is an abundant number, since it is smaller than the sum of its proper divisors (291080520).

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

123639480 is a wasteful number, since it uses less digits than its factorization.

123639480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 123639480 is about 11119.3291164530. The cubic root of 123639480 is about 498.1793518607.

The spelling of 123639480 in words is "one hundred twenty-three million, six hundred thirty-nine thousand, four hundred eighty".