43978272 has 96 divisors (see below), whose sum is σ = 125737920. Its totient is φ = 13378560.

The previous prime is 43978267. The next prime is 43978279. The reversal of 43978272 is 27287934.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43978279) 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 15 ways as a sum of consecutive naturals, for example, 163354 + ... + 163622.

It is an arithmetic number, because the mean of its divisors is an integer number (1309770).

Almost surely, 2^43978272 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 43978272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62868960).

43978272 is an abundant number, since it is smaller than the sum of its proper divisors (81759648).

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

43978272 is a wasteful number, since it uses less digits than its factorization.

43978272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 418 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 43978272 is about 6631.6115688421. The cubic root of 43978272 is about 352.9767122912.

The spelling of 43978272 in words is "forty-three million, nine hundred seventy-eight thousand, two hundred seventy-two".