123872028 has 48 divisors (see below), whose sum is σ = 332876544. Its totient is φ = 35118720.

The previous prime is 123872009. The next prime is 123872051. The reversal of 123872028 is 820278321.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 123872028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5376 + ... + 16632.

It is an arithmetic number, because the mean of its divisors is an integer number (6934928).

Almost surely, 2^123872028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123872028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166438272).

123872028 is an abundant number, since it is smaller than the sum of its proper divisors (209004516).

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

123872028 is a wasteful number, since it uses less digits than its factorization.

123872028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11402 (or 11400 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 123872028 is about 11129.7811299234. The cubic root of 123872028 is about 498.4914907098.

The spelling of 123872028 in words is "one hundred twenty-three million, eight hundred seventy-two thousand, twenty-eight".