123069780 has 168 divisors, whose sum is σ = 405441792. Its totient is φ = 31306176.

The previous prime is 123069719. The next prime is 123069781. The reversal of 123069780 is 87960321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123069781) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 335157 + ... + 335523.

It is an arithmetic number, because the mean of its divisors is an integer number (2413344).

Almost surely, 2^123069780 is an apocalyptic number.

123069780 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 123069780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202720896).

123069780 is an abundant number, since it is smaller than the sum of its proper divisors (282372012).

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

123069780 is a wasteful number, since it uses less digits than its factorization.

123069780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 123069780 is about 11093.6819857070. The cubic root of 123069780 is about 497.4130113979.

The spelling of 123069780 in words is "one hundred twenty-three million, sixty-nine thousand, seven hundred eighty".