40043634 has 16 divisors (see below), whose sum is σ = 82041120. Its totient is φ = 13022240.

The previous prime is 40043629. The next prime is 40043669. The reversal of 40043634 is 43634004.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81144 + ... + 81635.

It is an arithmetic number, because the mean of its divisors is an integer number (5127570).

Almost surely, 2^40043634 is an apocalyptic number.

40043634 is an abundant number, since it is smaller than the sum of its proper divisors (41997486).

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

40043634 is a wasteful number, since it uses less digits than its factorization.

40043634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162825.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 40043634 is about 6328.0039506941. The cubic root of 40043634 is about 342.1194992959.

Adding to 40043634 its reverse (43634004), we get a palindrome (83677638).

The spelling of 40043634 in words is "forty million, forty-three thousand, six hundred thirty-four".