43442730 has 40 divisors (see below), whose sum is σ = 116814852. Its totient is φ = 11584512.

The previous prime is 43442719. The next prime is 43442731. The reversal of 43442730 is 3724434.

It can be written as a sum of positive squares in 2 ways, for example, as 40487769 + 2954961 = 6363^2 + 1719^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 43442694 and 43442703.

It is not an unprimeable number, because it can be changed into a prime (43442731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26007 + ... + 27626.

Almost surely, 2^43442730 is an apocalyptic number.

43442730 is an abundant number, since it is smaller than the sum of its proper divisors (73372122).

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

43442730 is a wasteful number, since it uses less digits than its factorization.

43442730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53652 (or 53643 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 27.

The square root of 43442730 is about 6591.1099217051. The cubic root of 43442730 is about 351.5380745697.

The spelling of 43442730 in words is "forty-three million, four hundred forty-two thousand, seven hundred thirty".