43345728 has 42 divisors (see below), whose sum is σ = 124244354. Its totient is φ = 14448384.

The previous prime is 43345663. The next prime is 43345741. The reversal of 43345728 is 82754334.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 39841344 + 3504384 = 6312^2 + 1872^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 43345692 and 43345701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37051 + ... + 38202.

Almost surely, 2^43345728 is an apocalyptic number.

43345728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

43345728 is an abundant number, since it is smaller than the sum of its proper divisors (80898626).

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

43345728 is a wasteful number, since it uses less digits than its factorization.

43345728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75271 (or 75258 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 43345728 is about 6583.7472612487. The cubic root of 43345728 is about 351.2762332285.

The spelling of 43345728 in words is "forty-three million, three hundred forty-five thousand, seven hundred twenty-eight".