128472120 has 144 divisors (see below), whose sum is σ = 485769960. Its totient is φ = 29361024.

The previous prime is 128472067. The next prime is 128472133. The reversal of 128472120 is 21274821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13999 + ... + 21281.

Almost surely, 2^128472120 is an apocalyptic number.

128472120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128472120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242884980).

128472120 is an abundant number, since it is smaller than the sum of its proper divisors (357297840).

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

128472120 is a wasteful number, since it uses less digits than its factorization.

128472120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314 (or 7300 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 128472120 is about 11334.5542479623. The cubic root of 128472120 is about 504.5872783799.

The spelling of 128472120 in words is "one hundred twenty-eight million, four hundred seventy-two thousand, one hundred twenty".