43440030 has 64 divisors (see below), whose sum is σ = 116424000. Its totient is φ = 11525760.

The previous prime is 43440029. The next prime is 43440073. The reversal of 43440030 is 3004434.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43439985 and 43440012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94000 + ... + 94460.

It is an arithmetic number, because the mean of its divisors is an integer number (1819125).

Almost surely, 2^43440030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43440030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58212000).

43440030 is an abundant number, since it is smaller than the sum of its proper divisors (72983970).

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

43440030 is a wasteful number, since it uses less digits than its factorization.

43440030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 43440030 is about 6590.9050971775. The cubic root of 43440030 is about 351.5307916291.

Adding to 43440030 its reverse (3004434), we get a palindrome (46444464).

The spelling of 43440030 in words is "forty-three million, four hundred forty thousand, thirty".