128737272 has 32 divisors (see below), whose sum is σ = 322185600. Its totient is φ = 42866784.

The previous prime is 128737223. The next prime is 128737283. The reversal of 128737272 is 272737821.

It is a self number, because there is not a number n which added to its sum of digits gives 128737272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26229 + ... + 30747.

It is an arithmetic number, because the mean of its divisors is an integer number (10068300).

Almost surely, 2^128737272 is an apocalyptic number.

128737272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128737272 is an abundant number, since it is smaller than the sum of its proper divisors (193448328).

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

128737272 is a wasteful number, since it uses less digits than its factorization.

128737272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5715 (or 5711 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 128737272 is about 11346.2448413561. The cubic root of 128737272 is about 504.9341769582.

The spelling of 128737272 in words is "one hundred twenty-eight million, seven hundred thirty-seven thousand, two hundred seventy-two".