128351472 has 20 divisors (see below), whose sum is σ = 331574760. Its totient is φ = 42783808.

The previous prime is 128351437. The next prime is 128351473. The reversal of 128351472 is 274153821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128351473) 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, 1336947 + ... + 1337042.

It is an arithmetic number, because the mean of its divisors is an integer number (16578738).

Almost surely, 2^128351472 is an apocalyptic number.

128351472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128351472 is an abundant number, since it is smaller than the sum of its proper divisors (203223288).

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

128351472 is a wasteful number, since it uses less digits than its factorization.

128351472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674000 (or 2673994 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 128351472 is about 11329.2308653324. The cubic root of 128351472 is about 504.4292764919.

The spelling of 128351472 in words is "one hundred twenty-eight million, three hundred fifty-one thousand, four hundred seventy-two".