12494640 has 80 divisors (see below), whose sum is σ = 39283200. Its totient is φ = 3284736.

The previous prime is 12494633. The next prime is 12494653. The reversal of 12494640 is 4649421.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×12494640² = 312232057459200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12494598 and 12494607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18631 + ... + 19289.

It is an arithmetic number, because the mean of its divisors is an integer number (491040).

Almost surely, 2^12494640 is an apocalyptic number.

12494640 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 12494640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19641600).

12494640 is an abundant number, since it is smaller than the sum of its proper divisors (26788560).

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

12494640 is a wasteful number, since it uses less digits than its factorization.

12494640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 12494640 is about 3534.7758061863. The cubic root of 12494640 is about 232.0462650499.

The spelling of 12494640 in words is "twelve million, four hundred ninety-four thousand, six hundred forty".