43949640 has 64 divisors (see below), whose sum is σ = 150687360. Its totient is φ = 10045440.

The previous prime is 43949629. The next prime is 43949657. The reversal of 43949640 is 4694934.

43949640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×43949640² = 3863141712259200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25321 + ... + 27000.

It is an arithmetic number, because the mean of its divisors is an integer number (2354490).

Almost surely, 2^43949640 is an apocalyptic number.

43949640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43949640 is an abundant number, since it is smaller than the sum of its proper divisors (106737720).

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

43949640 is a wasteful number, since it uses less digits than its factorization.

43949640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52342 (or 52338 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 43949640 is about 6629.4524660789. The cubic root of 43949640 is about 352.9000939763.

The spelling of 43949640 in words is "forty-three million, nine hundred forty-nine thousand, six hundred forty".