12958728 has 16 divisors (see below), whose sum is σ = 32396880. Its totient is φ = 4319568.

The previous prime is 12958723. The next prime is 12958733. The reversal of 12958728 is 82785921.

It is an interprime number because it is at equal distance from previous prime (12958723) and next prime (12958733).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12958728.

It is not an unprimeable number, because it can be changed into a prime (12958723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269950 + ... + 269997.

It is an arithmetic number, because the mean of its divisors is an integer number (2024805).

Almost surely, 2^12958728 is an apocalyptic number.

It is an amenable number.

12958728 is an abundant number, since it is smaller than the sum of its proper divisors (19438152).

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

12958728 is a wasteful number, since it uses less digits than its factorization.

12958728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539956 (or 539952 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 12958728 is about 3599.8233289982. The cubic root of 12958728 is about 234.8843734785.

The spelling of 12958728 in words is "twelve million, nine hundred fifty-eight thousand, seven hundred twenty-eight".