128815448 has 32 divisors (see below), whose sum is σ = 251035200. Its totient is φ = 61893888.

The previous prime is 128815441. The next prime is 128815451. The reversal of 128815448 is 844518821.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128815441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52865 + ... + 55247.

It is an arithmetic number, because the mean of its divisors is an integer number (7844850).

Almost surely, 2^128815448 is an apocalyptic number.

It is an amenable number.

128815448 is a deficient number, since it is larger than the sum of its proper divisors (122219752).

128815448 is a wasteful number, since it uses less digits than its factorization.

128815448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651 (or 2647 counting only the distinct ones).

The product of its digits is 81920, while the sum is 41.

The square root of 128815448 is about 11349.6893349554. The cubic root of 128815448 is about 505.0363637508.

The spelling of 128815448 in words is "one hundred twenty-eight million, eight hundred fifteen thousand, four hundred forty-eight".