43608642 has 48 divisors (see below), whose sum is σ = 109574976. Its totient is φ = 11325600.

The previous prime is 43608641. The next prime is 43608647. The reversal of 43608642 is 24680634.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43608641) 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 23 ways as a sum of consecutive naturals, for example, 792 + ... + 9372.

It is an arithmetic number, because the mean of its divisors is an integer number (2282812).

Almost surely, 2^43608642 is an apocalyptic number.

43608642 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 43608642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54787488).

43608642 is an abundant number, since it is smaller than the sum of its proper divisors (65966334).

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

43608642 is a wasteful number, since it uses less digits than its factorization.

43608642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8615 (or 8604 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 43608642 is about 6603.6839718448. The cubic root of 43608642 is about 351.9850254046.

The spelling of 43608642 in words is "forty-three million, six hundred eight thousand, six hundred forty-two".