43421600 has 36 divisors (see below), whose sum is σ = 106004934. Its totient is φ = 17368320.

The previous prime is 43421597. The next prime is 43421603. The reversal of 43421600 is 612434.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43421597) and next prime (43421603).

It can be written as a sum of positive squares in 3 ways, for example, as 24167056 + 19254544 = 4916^2 + 4388^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (43421603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26339 + ... + 27938.

Almost surely, 2^43421600 is an apocalyptic number.

43421600 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43421600 is an abundant number, since it is smaller than the sum of its proper divisors (62583334).

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

43421600 is a wasteful number, since it uses less digits than its factorization.

43421600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54297 (or 54284 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 43421600 is about 6589.5068100731. The cubic root of 43421600 is about 351.4810707539.

The spelling of 43421600 in words is "forty-three million, four hundred twenty-one thousand, six hundred".