123840730 has 64 divisors (see below), whose sum is σ = 251475840. Its totient is φ = 43593984.

The previous prime is 123840721. The next prime is 123840737. The reversal of 123840730 is 37048321.

It is not an unprimeable number, because it can be changed into a prime (123840737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403237 + ... + 403543.

It is an arithmetic number, because the mean of its divisors is an integer number (3929310).

Almost surely, 2^123840730 is an apocalyptic number.

123840730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123840730 is an abundant number, since it is smaller than the sum of its proper divisors (127635110).

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

123840730 is a wasteful number, since it uses less digits than its factorization.

123840730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 123840730 is about 11128.3749936817. The cubic root of 123840730 is about 498.4495035582.

The spelling of 123840730 in words is "one hundred twenty-three million, eight hundred forty thousand, seven hundred thirty".