123244020 has 72 divisors (see below), whose sum is σ = 382558176. Its totient is φ = 32098752.

The previous prime is 123244007. The next prime is 123244031. The reversal of 123244020 is 20442321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 123243984 and 123244002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222 + ... + 15701.

It is an arithmetic number, because the mean of its divisors is an integer number (5313308).

Almost surely, 2^123244020 is an apocalyptic number.

123244020 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 123244020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191279088).

123244020 is an abundant number, since it is smaller than the sum of its proper divisors (259314156).

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

123244020 is a wasteful number, since it uses less digits than its factorization.

123244020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15981 (or 15976 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 123244020 is about 11101.5323266655. The cubic root of 123244020 is about 497.6476435273.

Adding to 123244020 its reverse (20442321), we get a palindrome (143686341).

The spelling of 123244020 in words is "one hundred twenty-three million, two hundred forty-four thousand, twenty".