43616642 has 4 divisors (see below), whose sum is σ = 65424966. Its totient is φ = 21808320.

The previous prime is 43616633. The next prime is 43616653. The reversal of 43616642 is 24661634.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39450961 + 4165681 = 6281^2 + 2041^2 .

It is a super-2 number, since 2×43616642² = 3804822918712328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43616599 and 43616608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10904159 + ... + 10904162.

Almost surely, 2^43616642 is an apocalyptic number.

43616642 is a deficient number, since it is larger than the sum of its proper divisors (21808324).

43616642 is a wasteful number, since it uses less digits than its factorization.

43616642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21808323.

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

The square root of 43616642 is about 6604.2896665728. The cubic root of 43616642 is about 352.0065479584.

The spelling of 43616642 in words is "forty-three million, six hundred sixteen thousand, six hundred forty-two".