128732148 has 18 divisors (see below), whose sum is σ = 325406354. Its totient is φ = 42910704.

The previous prime is 128732141. The next prime is 128732171. The reversal of 128732148 is 841237821.

It can be written as a sum of positive squares in only one way, i.e., 104407524 + 24324624 = 10218^2 + 4932^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3575893 = 128732148 / (1 + 2 + 8 + 7 + 3 + 2 + 1 + 4 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128732141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1787911 + ... + 1787982.

Almost surely, 2^128732148 is an apocalyptic number.

128732148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128732148 is an abundant number, since it is smaller than the sum of its proper divisors (196674206).

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

128732148 is a wasteful number, since it uses less digits than its factorization.

128732148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575903 (or 3575898 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 128732148 is about 11346.0190375303. The cubic root of 128732148 is about 504.9274777404.

Adding to 128732148 its reverse (841237821), we get a palindrome (969969969).

The spelling of 128732148 in words is "one hundred twenty-eight million, seven hundred thirty-two thousand, one hundred forty-eight".