43423400 has 24 divisors (see below), whose sum is σ = 100959870. Its totient is φ = 17369280.

The previous prime is 43423361. The next prime is 43423409. The reversal of 43423400 is 432434.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 23833924 + 19589476 = 4882^2 + 4426^2 .

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 (43423409) 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, 108359 + ... + 108758.

Almost surely, 2^43423400 is an apocalyptic number.

43423400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43423400 is an abundant number, since it is smaller than the sum of its proper divisors (57536470).

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

43423400 is a wasteful number, since it uses less digits than its factorization.

43423400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217133 (or 217124 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 43423400 is about 6589.6433894407. The cubic root of 43423400 is about 351.4859274549.

Adding to 43423400 its reverse (432434), we get a palindrome (43855834).

The spelling of 43423400 in words is "forty-three million, four hundred twenty-three thousand, four hundred".