43649928 has 80 divisors (see below), whose sum is σ = 139740480. Its totient is φ = 12470112.

The previous prime is 43649923. The next prime is 43649941. The reversal of 43649928 is 82994634.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (43649923) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 276 + ... + 9347.

It is an arithmetic number, because the mean of its divisors is an integer number (1746756).

Almost surely, 2^43649928 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 43649928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69870240).

43649928 is an abundant number, since it is smaller than the sum of its proper divisors (96090552).

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

43649928 is a wasteful number, since it uses less digits than its factorization.

43649928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9648 (or 9635 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 43649928 is about 6606.8092147420. The cubic root of 43649928 is about 352.0960696800.

The spelling of 43649928 in words is "forty-three million, six hundred forty-nine thousand, nine hundred twenty-eight".