43545420 has 36 divisors (see below), whose sum is σ = 132088320. Its totient is φ = 11612064.

The previous prime is 43545407. The next prime is 43545457. The reversal of 43545420 is 2454534.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120780 + ... + 121139.

It is an arithmetic number, because the mean of its divisors is an integer number (3669120).

Almost surely, 2^43545420 is an apocalyptic number.

It is an amenable number.

43545420 is an abundant number, since it is smaller than the sum of its proper divisors (88542900).

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

43545420 is a wasteful number, since it uses less digits than its factorization.

43545420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241934 (or 241929 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 43545420 is about 6598.8953621042. The cubic root of 43545420 is about 351.8148453757.

Adding to 43545420 its reverse (2454534), we get a palindrome (45999954).

The spelling of 43545420 in words is "forty-three million, five hundred forty-five thousand, four hundred twenty".