40002434 has 4 divisors (see below), whose sum is σ = 60003654. Its totient is φ = 20001216.

The previous prime is 40002433. The next prime is 40002437. The reversal of 40002434 is 43420004.

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., 38477209 + 1525225 = 6203^2 + 1235^2 .

It is not an unprimeable number, because it can be changed into a prime (40002433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000607 + ... + 10000610.

Almost surely, 2^40002434 is an apocalyptic number.

40002434 is a deficient number, since it is larger than the sum of its proper divisors (20001220).

40002434 is a wasteful number, since it uses less digits than its factorization.

40002434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001219.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 40002434 is about 6324.7477420052. The cubic root of 40002434 is about 342.0021259971.

Adding to 40002434 its reverse (43420004), we get a palindrome (83422438).

The spelling of 40002434 in words is "forty million, two thousand, four hundred thirty-four".