12538736 has 20 divisors (see below), whose sum is σ = 27764592. Its totient is φ = 5373696.

The previous prime is 12538723. The next prime is 12538753. The reversal of 12538736 is 63783521.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12538696 and 12538705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55865 + ... + 56088.

Almost surely, 2^12538736 is an apocalyptic number.

12538736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12538736 is an abundant number, since it is smaller than the sum of its proper divisors (15225856).

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

12538736 is a wasteful number, since it uses less digits than its factorization.

12538736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111968 (or 111962 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 12538736 is about 3541.0077661592. The cubic root of 12538736 is about 232.3189232559.

The spelling of 12538736 in words is "twelve million, five hundred thirty-eight thousand, seven hundred thirty-six".