128137072 has 20 divisors (see below), whose sum is σ = 283732336. Its totient is φ = 54915840.

The previous prime is 128137069. The next prime is 128137073. The reversal of 128137072 is 270731821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128137073) 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, 571929 + ... + 572152.

Almost surely, 2^128137072 is an apocalyptic number.

It is an amenable number.

128137072 is an abundant number, since it is smaller than the sum of its proper divisors (155595264).

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

128137072 is a wasteful number, since it uses less digits than its factorization.

128137072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144096 (or 1144090 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 128137072 is about 11319.7646618647. The cubic root of 128137072 is about 504.1482515081.

Adding to 128137072 its reverse (270731821), we get a palindrome (398868893).

The spelling of 128137072 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, seventy-two".