43989456 has 120 divisors (see below), whose sum is σ = 134857440. Its totient is φ = 12316416.

The previous prime is 43989437. The next prime is 43989461. The reversal of 43989456 is 65498934.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138610 + ... + 138926.

It is an arithmetic number, because the mean of its divisors is an integer number (1123812).

Almost surely, 2^43989456 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 43989456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67428720).

43989456 is an abundant number, since it is smaller than the sum of its proper divisors (90867984).

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

43989456 is a wasteful number, since it uses less digits than its factorization.

43989456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 388 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 43989456 is about 6632.4547491860. The cubic root of 43989456 is about 353.0066312851.

The spelling of 43989456 in words is "forty-three million, nine hundred eighty-nine thousand, four hundred fifty-six".