43005420 has 36 divisors (see below), whose sum is σ = 130450320. Its totient is φ = 11468064.

The previous prime is 43005407. The next prime is 43005437. The reversal of 43005420 is 2450034.

It is a happy number.

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

It is a super-2 number, since 2×43005420² = 3698932298752800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 43005393 and 43005402.

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, 119280 + ... + 119639.

It is an arithmetic number, because the mean of its divisors is an integer number (3623620).

Almost surely, 2^43005420 is an apocalyptic number.

It is an amenable number.

43005420 is an abundant number, since it is smaller than the sum of its proper divisors (87444900).

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

43005420 is a wasteful number, since it uses less digits than its factorization.

43005420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238934 (or 238929 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 43005420 is about 6557.8517824056. The cubic root of 43005420 is about 350.3545251237.

Adding to 43005420 its reverse (2450034), we get a palindrome (45455454).

The spelling of 43005420 in words is "forty-three million, five thousand, four hundred twenty".