123445056 has 112 divisors (see below), whose sum is σ = 380536704. Its totient is φ = 34584576.

The previous prime is 123445037. The next prime is 123445081. The reversal of 123445056 is 650544321.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-3 number, since 3×123445056³ (a number of 25 digits) contains 333 as substring.

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, 70366 + ... + 72098.

Almost surely, 2^123445056 is an apocalyptic number.

123445056 is a gapful number since it is divisible by the number (16) 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 123445056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190268352).

123445056 is an abundant number, since it is smaller than the sum of its proper divisors (257091648).

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

123445056 is a wasteful number, since it uses less digits than its factorization.

123445056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 123445056 is about 11110.5830630080. The cubic root of 123445056 is about 497.9180846218.

Adding to 123445056 its reverse (650544321), we get a palindrome (773989377).

The spelling of 123445056 in words is "one hundred twenty-three million, four hundred forty-five thousand, fifty-six".