128516472 has 48 divisors (see below), whose sum is σ = 397790640. Its totient is φ = 36718848.

The previous prime is 128516459. The next prime is 128516473. The reversal of 128516472 is 274615821.

128516472 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 1 + 647 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128516473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126993 + ... + 128000.

It is an arithmetic number, because the mean of its divisors is an integer number (8287305).

Almost surely, 2^128516472 is an apocalyptic number.

128516472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128516472 is an abundant number, since it is smaller than the sum of its proper divisors (269274168).

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

128516472 is a wasteful number, since it uses less digits than its factorization.

128516472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255012 (or 255005 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 128516472 is about 11336.5105742464. The cubic root of 128516472 is about 504.6453373584.

The spelling of 128516472 in words is "one hundred twenty-eight million, five hundred sixteen thousand, four hundred seventy-two".