12340728 has 128 divisors (see below), whose sum is σ = 37632000. Its totient is φ = 3732480.

The previous prime is 12340703. The next prime is 12340733. The reversal of 12340728 is 82704321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 127176 + ... + 127272.

It is an arithmetic number, because the mean of its divisors is an integer number (294000).

Almost surely, 2^12340728 is an apocalyptic number.

12340728 is a gapful number since it is divisible by the number (18) 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 12340728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18816000).

12340728 is an abundant number, since it is smaller than the sum of its proper divisors (25291272).

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

12340728 is a wasteful number, since it uses less digits than its factorization.

12340728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 12340728 is about 3512.9372325733. The cubic root of 12340728 is about 231.0895250905.

The spelling of 12340728 in words is "twelve million, three hundred forty thousand, seven hundred twenty-eight".