43620634 has 4 divisors (see below), whose sum is σ = 65430954. Its totient is φ = 21810316.

The previous prime is 43620631. The next prime is 43620667. The reversal of 43620634 is 43602634.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43602634 = 2 ⋅21801317.

It can be written as a sum of positive squares in only one way, i.e., 43599609 + 21025 = 6603^2 + 145^2 .

It is not an unprimeable number, because it can be changed into a prime (43620631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10905157 + ... + 10905160.

Almost surely, 2^43620634 is an apocalyptic number.

43620634 is a deficient number, since it is larger than the sum of its proper divisors (21810320).

43620634 is a wasteful number, since it uses less digits than its factorization.

43620634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21810319.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 43620634 is about 6604.5918874674. The cubic root of 43620634 is about 352.0172867285.

The spelling of 43620634 in words is "forty-three million, six hundred twenty thousand, six hundred thirty-four".