43909968 has 20 divisors (see below), whose sum is σ = 113434208. Its totient is φ = 14636640.

The previous prime is 43909951. The next prime is 43909979. The reversal of 43909968 is 86990934.

It is a happy number.

It is a super-2 number, since 2×43909968² = 3856170579522048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 914791 = 43909968 / (4 + 3 + 9 + 0 + 9 + 9 + 6 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457348 + ... + 457443.

Almost surely, 2^43909968 is an apocalyptic number.

43909968 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

43909968 is an abundant number, since it is smaller than the sum of its proper divisors (69524240).

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

43909968 is a wasteful number, since it uses less digits than its factorization.

43909968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914802 (or 914796 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 43909968 is about 6626.4596882498. The cubic root of 43909968 is about 352.7938779590.

The spelling of 43909968 in words is "forty-three million, nine hundred nine thousand, nine hundred sixty-eight".