43661642 has 8 divisors (see below), whose sum is σ = 65546496. Its totient is φ = 21812812.

The previous prime is 43661633. The next prime is 43661687. The reversal of 43661642 is 24616634.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 43661599 and 43661608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5738 + ... + 10965.

It is an arithmetic number, because the mean of its divisors is an integer number (8193312).

Almost surely, 2^43661642 is an apocalyptic number.

43661642 is a deficient number, since it is larger than the sum of its proper divisors (21884854).

43661642 is a wasteful number, since it uses less digits than its factorization.

43661642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18012.

The product of its digits is 20736, while the sum is 32.

The square root of 43661642 is about 6607.6956649047. The cubic root of 43661642 is about 352.1275633132.

The spelling of 43661642 in words is "forty-three million, six hundred sixty-one thousand, six hundred forty-two".