43987320 has 192 divisors, whose sum is σ = 159429600. Its totient is φ = 10782720.

The previous prime is 43987319. The next prime is 43987327. The reversal of 43987320 is 2378934.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43987327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 182400 + ... + 182640.

Almost surely, 2^43987320 is an apocalyptic number.

43987320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43987320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79714800).

43987320 is an abundant number, since it is smaller than the sum of its proper divisors (115442280).

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

43987320 is a wasteful number, since it uses less digits than its factorization.

43987320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 43987320 is about 6632.2937208782. The cubic root of 43987320 is about 353.0009175343. Note that the first 3 decimals are identical.

The spelling of 43987320 in words is "forty-three million, nine hundred eighty-seven thousand, three hundred twenty".