12431730 has 64 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 3089856.

The previous prime is 12431711. The next prime is 12431759. The reversal of 12431730 is 3713421.

It is a junction number, because it is equal to n+sod(n) for n = 12431697 and 12431706.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29461 + ... + 29879.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^12431730 is an apocalyptic number.

12431730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12431730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15966720).

12431730 is an abundant number, since it is smaller than the sum of its proper divisors (19501710).

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

12431730 is a wasteful number, since it uses less digits than its factorization.

12431730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 12431730 is about 3525.8658511066. The cubic root of 12431730 is about 231.6561617881.

The spelling of 12431730 in words is "twelve million, four hundred thirty-one thousand, seven hundred thirty".