43206540 has 72 divisors (see below), whose sum is σ = 131030928. Its totient is φ = 10632960.

The previous prime is 43206539. The next prime is 43206617. The reversal of 43206540 is 4560234.

It is a self number, because there is not a number n which added to its sum of digits gives 43206540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8010 + ... + 12270.

It is an arithmetic number, because the mean of its divisors is an integer number (1819874).

Almost surely, 2^43206540 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 43206540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65515464).

43206540 is an abundant number, since it is smaller than the sum of its proper divisors (87824388).

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

43206540 is a wasteful number, since it uses less digits than its factorization.

43206540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299 (or 4284 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 43206540 is about 6573.1681858903. The cubic root of 43206540 is about 350.8998342440.

Adding to 43206540 its reverse (4560234), we get a palindrome (47766774).

The spelling of 43206540 in words is "forty-three million, two hundred six thousand, five hundred forty".