43396820 has 12 divisors (see below), whose sum is σ = 91133364. Its totient is φ = 17358720.

The previous prime is 43396783. The next prime is 43396823. The reversal of 43396820 is 2869334.

It is a happy number.

43396820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13410244 + 29986576 = 3662^2 + 5476^2 .

It is a super-2 number, since 2×43396820² = 3766567972224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43396823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084901 + ... + 1084940.

It is an arithmetic number, because the mean of its divisors is an integer number (7594447).

Almost surely, 2^43396820 is an apocalyptic number.

It is an amenable number.

43396820 is an abundant number, since it is smaller than the sum of its proper divisors (47736544).

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

43396820 is a wasteful number, since it uses less digits than its factorization.

43396820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169850 (or 2169848 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 43396820 is about 6587.6262796246. The cubic root of 43396820 is about 351.4141965232.

The spelling of 43396820 in words is "forty-three million, three hundred ninety-six thousand, eight hundred twenty".