43381072 has 30 divisors (see below), whose sum is σ = 97775178. Its totient is φ = 18591552.

The previous prime is 43381069. The next prime is 43381081. The reversal of 43381072 is 27018334.

It can be written as a sum of positive squares in only one way, i.e., 30735936 + 12645136 = 5544^2 + 3556^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 43381072.

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, 26883 + ... + 28450.

Almost surely, 2^43381072 is an apocalyptic number.

It is an amenable number.

43381072 is an abundant number, since it is smaller than the sum of its proper divisors (54394106).

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

43381072 is a wasteful number, since it uses less digits than its factorization.

43381072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55355 (or 55342 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 43381072 is about 6586.4308999640. The cubic root of 43381072 is about 351.3716838820.

The spelling of 43381072 in words is "forty-three million, three hundred eighty-one thousand, seventy-two".