43420100 has 18 divisors (see below), whose sum is σ = 94221834. Its totient is φ = 17368000.

The previous prime is 43420079. The next prime is 43420109. The reversal of 43420100 is 102434.

It can be written as a sum of positive squares in 3 ways, for example, as 5769604 + 37650496 = 2402^2 + 6136^2 .

It is not an unprimeable number, because it can be changed into a prime (43420109) 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 5 ways as a sum of consecutive naturals, for example, 217001 + ... + 217200.

Almost surely, 2^43420100 is an apocalyptic number.

It is an amenable number.

43420100 is an abundant number, since it is smaller than the sum of its proper divisors (50801734).

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

43420100 is a wasteful number, since it uses less digits than its factorization.

43420100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434215 (or 434208 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 43420100 is about 6589.3929917709. The cubic root of 43420100 is about 351.4770234005.

Adding to 43420100 its reverse (102434), we get a palindrome (43522534).

The spelling of 43420100 in words is "forty-three million, four hundred twenty thousand, one hundred".