43400220 has 24 divisors (see below), whose sum is σ = 121520784. Its totient is φ = 11573376.

The previous prime is 43400207. The next prime is 43400221. The reversal of 43400220 is 2200434.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 43400220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43400221) 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, 361609 + ... + 361728.

It is an arithmetic number, because the mean of its divisors is an integer number (5063366).

Almost surely, 2^43400220 is an apocalyptic number.

It is an amenable number.

43400220 is an abundant number, since it is smaller than the sum of its proper divisors (78120564).

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

43400220 is a wasteful number, since it uses less digits than its factorization.

43400220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723349 (or 723347 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 43400220 is about 6587.8843341395. The cubic root of 43400220 is about 351.4233736708.

Adding to 43400220 its reverse (2200434), we get a palindrome (45600654).

The spelling of 43400220 in words is "forty-three million, four hundred thousand, two hundred twenty".