128149448 has 64 divisors (see below), whose sum is σ = 283046400. Its totient is φ = 53256960.

The previous prime is 128149423. The next prime is 128149457. The reversal of 128149448 is 844941821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476258 + ... + 476526.

It is an arithmetic number, because the mean of its divisors is an integer number (4422600).

Almost surely, 2^128149448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128149448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141523200).

128149448 is an abundant number, since it is smaller than the sum of its proper divisors (154896952).

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

128149448 is a wasteful number, since it uses less digits than its factorization.

128149448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 506 counting only the distinct ones).

The product of its digits is 73728, while the sum is 41.

The square root of 128149448 is about 11320.3113031400. The cubic root of 128149448 is about 504.1644818823.

The spelling of 128149448 in words is "one hundred twenty-eight million, one hundred forty-nine thousand, four hundred forty-eight".