43209642 has 32 divisors (see below), whose sum is σ = 99021312. Its totient is φ = 12313584.

The previous prime is 43209637. The next prime is 43209643. The reversal of 43209642 is 24690234.

43209642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (43209643) 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 15 ways as a sum of consecutive naturals, for example, 18513 + ... + 20715.

It is an arithmetic number, because the mean of its divisors is an integer number (3094416).

Almost surely, 2^43209642 is an apocalyptic number.

43209642 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

43209642 is an abundant number, since it is smaller than the sum of its proper divisors (55811670).

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

43209642 is a wasteful number, since it uses less digits than its factorization.

43209642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 43209642 is about 6573.4041409303. The cubic root of 43209642 is about 350.9082316242.

Adding to 43209642 its reverse (24690234), we get a palindrome (67899876).

The spelling of 43209642 in words is "forty-three million, two hundred nine thousand, six hundred forty-two".