43720134 has 8 divisors (see below), whose sum is σ = 87440280. Its totient is φ = 14573376.

The previous prime is 43720133. The next prime is 43720147. The reversal of 43720134 is 43102734.

It is a sphenic number, since it is the product of 3 distinct primes.

43720134 is an admirable number.

It is a super-2 number, since 2×43720134² = 3822900233955912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43720133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3643339 + ... + 3643350.

It is an arithmetic number, because the mean of its divisors is an integer number (10930035).

Almost surely, 2^43720134 is an apocalyptic number.

43720134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

43720134 is a wasteful number, since it uses less digits than its factorization.

43720134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286694.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 43720134 is about 6612.1202348415. The cubic root of 43720134 is about 352.2847375420.

Adding to 43720134 its reverse (43102734), we get a palindrome (86822868).

The spelling of 43720134 in words is "forty-three million, seven hundred twenty thousand, one hundred thirty-four".