123280056 has 240 divisors, whose sum is σ = 398312640. Its totient is φ = 35458560.

The previous prime is 123280033. The next prime is 123280057. The reversal of 123280056 is 650082321.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123280057) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3976761 + ... + 3976791.

It is an arithmetic number, because the mean of its divisors is an integer number (1659636).

Almost surely, 2^123280056 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 123280056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199156320).

123280056 is an abundant number, since it is smaller than the sum of its proper divisors (275032584).

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

123280056 is a wasteful number, since it uses less digits than its factorization.

123280056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 123280056 is about 11103.1552272316. The cubic root of 123280056 is about 497.6961421155.

The spelling of 123280056 in words is "one hundred twenty-three million, two hundred eighty thousand, fifty-six".