43390672 has 20 divisors (see below), whose sum is σ = 90536740. Its totient is φ = 20026368.

The previous prime is 43390639. The next prime is 43390679. The reversal of 43390672 is 27609334.

It can be written as a sum of positive squares in 2 ways, for example, as 5494336 + 37896336 = 2344^2 + 6156^2 .

It is a super-3 number, since 3×43390672³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43390679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104097 + ... + 104512.

It is an arithmetic number, because the mean of its divisors is an integer number (4526837).

Almost surely, 2^43390672 is an apocalyptic number.

It is an amenable number.

43390672 is an abundant number, since it is smaller than the sum of its proper divisors (47146068).

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

43390672 is a wasteful number, since it uses less digits than its factorization.

43390672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208630 (or 208624 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 43390672 is about 6587.1596306754. The cubic root of 43390672 is about 351.3976008639.

The spelling of 43390672 in words is "forty-three million, three hundred ninety thousand, six hundred seventy-two".