128724448 has 24 divisors (see below), whose sum is σ = 253804320. Its totient is φ = 64266240.

The previous prime is 128724437. The next prime is 128724469. The reversal of 128724448 is 844427821.

It is a self number, because there is not a number n which added to its sum of digits gives 128724448.

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, 21993 + ... + 27223.

It is an arithmetic number, because the mean of its divisors is an integer number (10575180).

Almost surely, 2^128724448 is an apocalyptic number.

It is an amenable number.

128724448 is a deficient number, since it is larger than the sum of its proper divisors (125079872).

128724448 is an equidigital number, since it uses as much as digits as its factorization.

128724448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010 (or 6002 counting only the distinct ones).

The product of its digits is 114688, while the sum is 40.

The square root of 128724448 is about 11345.6797063904. The cubic root of 128724448 is about 504.9174102757.

The spelling of 128724448 in words is "one hundred twenty-eight million, seven hundred twenty-four thousand, four hundred forty-eight".