128200272 has 40 divisors (see below), whose sum is σ = 332225760. Its totient is φ = 42599040.

The previous prime is 128200249. The next prime is 128200273. The reversal of 128200272 is 272002821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128200273) 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, 11854 + ... + 19922.

It is an arithmetic number, because the mean of its divisors is an integer number (8305644).

Almost surely, 2^128200272 is an apocalyptic number.

128200272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128200272 is an abundant number, since it is smaller than the sum of its proper divisors (204025488).

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

128200272 is a wasteful number, since it uses less digits than its factorization.

128200272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8411 (or 8405 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 128200272 is about 11322.5558952032. Note that the first 3 decimals coincide. The cubic root of 128200272 is about 504.2311235244.

The spelling of 128200272 in words is "one hundred twenty-eight million, two hundred thousand, two hundred seventy-two".