43146640 has 40 divisors (see below), whose sum is σ = 101600640. Its totient is φ = 17037696.

The previous prime is 43146619. The next prime is 43146647. The reversal of 43146640 is 4664134.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 43146599 and 43146608.

It is not an unprimeable number, because it can be changed into a prime (43146647) 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 7 ways as a sum of consecutive naturals, for example, 2907 + ... + 9733.

It is an arithmetic number, because the mean of its divisors is an integer number (2540016).

Almost surely, 2^43146640 is an apocalyptic number.

43146640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43146640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50800320).

43146640 is an abundant number, since it is smaller than the sum of its proper divisors (58454000).

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

43146640 is a wasteful number, since it uses less digits than its factorization.

43146640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6919 (or 6913 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 43146640 is about 6568.6102030795. The cubic root of 43146640 is about 350.7376009274.

The spelling of 43146640 in words is "forty-three million, one hundred forty-six thousand, six hundred forty".