43649628 has 24 divisors (see below), whose sum is σ = 111108480. Its totient is φ = 13227120.

The previous prime is 43649621. The next prime is 43649647. The reversal of 43649628 is 82694634.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 43649628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43649621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165208 + ... + 165471.

It is an arithmetic number, because the mean of its divisors is an integer number (4629520).

Almost surely, 2^43649628 is an apocalyptic number.

It is an amenable number.

43649628 is an abundant number, since it is smaller than the sum of its proper divisors (67458852).

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

43649628 is a wasteful number, since it uses less digits than its factorization.

43649628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330697 (or 330695 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 43649628 is about 6606.7865108538. The cubic root of 43649628 is about 352.0952630420.

The spelling of 43649628 in words is "forty-three million, six hundred forty-nine thousand, six hundred twenty-eight".