123236799840 has 3072 divisors, whose sum is σ = 635417395200. Its totient is φ = 21499084800.

The previous prime is 123236799817. The next prime is 123236799863. The reversal of 123236799840 is 48997632321.

123236799840 is a `hidden beast` number, since 1 + 232 + 367 + 9 + 9 + 8 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (123236799817) and next prime (123236799863).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 3330724302 + ... + 3330724338.

It is an arithmetic number, because the mean of its divisors is an integer number (206841600).

Almost surely, 2^123236799840 is an apocalyptic number.

123236799840 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 123236799840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317708697600).

123236799840 is an abundant number, since it is smaller than the sum of its proper divisors (512180595360).

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

123236799840 is a wasteful number, since it uses less digits than its factorization.

123236799840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 123236799840 in words is "one hundred twenty-three billion, two hundred thirty-six million, seven hundred ninety-nine thousand, eight hundred forty".