43720432 has 40 divisors (see below), whose sum is σ = 99181152. Its totient is φ = 18278400.

The previous prime is 43720423. The next prime is 43720459. The reversal of 43720432 is 23402734.

It is a super-2 number, since 2×43720432² = 3822952348533248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43720397 and 43720406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169 + ... + 9352.

Almost surely, 2^43720432 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 43720432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49590576).

43720432 is an abundant number, since it is smaller than the sum of its proper divisors (55460720).

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

43720432 is a wasteful number, since it uses less digits than its factorization.

43720432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9577 (or 9571 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 43720432 is about 6612.1427691785. The cubic root of 43720432 is about 352.2855379407.

The spelling of 43720432 in words is "forty-three million, seven hundred twenty thousand, four hundred thirty-two".