128274720 has 96 divisors (see below), whose sum is σ = 461801088. Its totient is φ = 29319168.

The previous prime is 128274689. The next prime is 128274737. The reversal of 128274720 is 27472821.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15729 + ... + 22448.

It is an arithmetic number, because the mean of its divisors is an integer number (4810428).

Almost surely, 2^128274720 is an apocalyptic number.

128274720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128274720 is an abundant number, since it is smaller than the sum of its proper divisors (333526368).

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

128274720 is a wasteful number, since it uses less digits than its factorization.

128274720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38202 (or 38194 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 128274720 is about 11325.8430149813. The cubic root of 128274720 is about 504.3287097306.

The spelling of 128274720 in words is "one hundred twenty-eight million, two hundred seventy-four thousand, seven hundred twenty".