123404783040 has 1680 divisors, whose sum is σ = 569361364704. Its totient is φ = 25291284480.

The previous prime is 123404783017. The next prime is 123404783071. The reversal of 123404783040 is 40387404321.

123404783040 is a `hidden beast` number, since 1 + 2 + 340 + 4 + 7 + 8 + 304 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1680).

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

It is a junction number, because it is equal to n+sod(n) for n = 123404782986 and 123404783004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1690476444 + ... + 1690476516.

Almost surely, 2^123404783040 is an apocalyptic number.

123404783040 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 123404783040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284680682352).

123404783040 is an abundant number, since it is smaller than the sum of its proper divisors (445956581664).

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

123404783040 is an equidigital number, since it uses as much as digits as its factorization.

123404783040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 123404783040 in words is "one hundred twenty-three billion, four hundred four million, seven hundred eighty-three thousand, forty".