128272824 has 24 divisors (see below), whose sum is σ = 347405760. Its totient is φ = 42757584.

The previous prime is 128272811. The next prime is 128272831. The reversal of 128272824 is 428272821.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 890712 + ... + 890855.

It is an arithmetic number, because the mean of its divisors is an integer number (14475240).

Almost surely, 2^128272824 is an apocalyptic number.

It is an amenable number.

128272824 is an abundant number, since it is smaller than the sum of its proper divisors (219132936).

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

128272824 is a wasteful number, since it uses less digits than its factorization.

128272824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781579 (or 1781572 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 128272824 is about 11325.7593122934. The cubic root of 128272824 is about 504.3262249283.

It can be divided in two parts, 12827 and 2824, that added together give a palindrome (15651).

The spelling of 128272824 in words is "one hundred twenty-eight million, two hundred seventy-two thousand, eight hundred twenty-four".