123394720 has 24 divisors (see below), whose sum is σ = 291520404. Its totient is φ = 49357824.

The previous prime is 123394717. The next prime is 123394723. The reversal of 123394720 is 27493321.

It is an interprime number because it is at equal distance from previous prime (123394717) and next prime (123394723).

It can be written as a sum of positive squares in 2 ways, for example, as 123387664 + 7056 = 11108^2 + 84^2 .

It is not an unprimeable number, because it can be changed into a prime (123394723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385449 + ... + 385768.

Almost surely, 2^123394720 is an apocalyptic number.

123394720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123394720 is an abundant number, since it is smaller than the sum of its proper divisors (168125684).

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

123394720 is an equidigital number, since it uses as much as digits as its factorization.

123394720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771232 (or 771224 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 123394720 is about 11108.3176043900. The cubic root of 123394720 is about 497.8503983358.

The spelling of 123394720 in words is "one hundred twenty-three million, three hundred ninety-four thousand, seven hundred twenty".