43988364 has 72 divisors (see below), whose sum is σ = 127938720. Its totient is φ = 12483072.

The previous prime is 43988341. The next prime is 43988407. The reversal of 43988364 is 46388934.

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, 43092 + ... + 44100.

Almost surely, 2^43988364 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 43988364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63969360).

43988364 is an abundant number, since it is smaller than the sum of its proper divisors (83950356).

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

43988364 is a wasteful number, since it uses less digits than its factorization.

43988364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1194 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 43988364 is about 6632.3724262137. The cubic root of 43988364 is about 353.0037102334.

Adding to 43988364 its product of digits (497664), we get a triangular number (44486028 = T₉₄₃₂).

The spelling of 43988364 in words is "forty-three million, nine hundred eighty-eight thousand, three hundred sixty-four".