43720216 has 32 divisors (see below), whose sum is σ = 86630400. Its totient is φ = 20628000.

The previous prime is 43720189. The next prime is 43720219. The reversal of 43720216 is 61202734.

It is a super-2 number, since 2×43720216² = 3822914574173312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43720219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57841 + ... + 58591.

It is an arithmetic number, because the mean of its divisors is an integer number (2707200).

Almost surely, 2^43720216 is an apocalyptic number.

It is an amenable number.

43720216 is a deficient number, since it is larger than the sum of its proper divisors (42910184).

43720216 is a wasteful number, since it uses less digits than its factorization.

43720216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 43720216 is about 6612.1264355727. The cubic root of 43720216 is about 352.2849577863.

The spelling of 43720216 in words is "forty-three million, seven hundred twenty thousand, two hundred sixteen".