43401634 has 8 divisors (see below), whose sum is σ = 65135340. Its totient is φ = 21689856.

The previous prime is 43401601. The next prime is 43401637. The reversal of 43401634 is 43610434.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42185025 + 1216609 = 6495^2 + 1103^2 .

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 = 43401599 and 43401608.

It is not an unprimeable number, because it can be changed into a prime (43401637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002 + ... + 9370.

Almost surely, 2^43401634 is an apocalyptic number.

43401634 is a deficient number, since it is larger than the sum of its proper divisors (21733706).

43401634 is a wasteful number, since it uses less digits than its factorization.

43401634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10964.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 43401634 is about 6587.9916514823. The cubic root of 43401634 is about 351.4271901434.

The spelling of 43401634 in words is "forty-three million, four hundred one thousand, six hundred thirty-four".