123366640 has 60 divisors (see below), whose sum is σ = 292429944. Its totient is φ = 48400768.

The previous prime is 123366619. The next prime is 123366643. The reversal of 123366640 is 46663321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123366643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278259 + ... + 278701.

Almost surely, 2^123366640 is an apocalyptic number.

123366640 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 123366640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146214972).

123366640 is an abundant number, since it is smaller than the sum of its proper divisors (169063304).

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

123366640 is an equidigital number, since it uses as much as digits as its factorization.

123366640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 123366640 is about 11107.0536147081. The cubic root of 123366640 is about 497.8126314586.

The spelling of 123366640 in words is "one hundred twenty-three million, three hundred sixty-six thousand, six hundred forty".