43272864 has 72 divisors (see below), whose sum is σ = 124406100. Its totient is φ = 14266368.

The previous prime is 43272839. The next prime is 43272881. The reversal of 43272864 is 46827234.

It can be written as a sum of positive squares in 2 ways, for example, as 42771600 + 501264 = 6540^2 + 708^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27162 + ... + 28710.

Almost surely, 2^43272864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43272864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62203050).

43272864 is an abundant number, since it is smaller than the sum of its proper divisors (81133236).

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

43272864 is a wasteful number, since it uses less digits than its factorization.

43272864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662 (or 1651 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 43272864 is about 6578.2113070348. The cubic root of 43272864 is about 351.0792915078.

The spelling of 43272864 in words is "forty-three million, two hundred seventy-two thousand, eight hundred sixty-four".