40005338 has 4 divisors (see below), whose sum is σ = 60008010. Its totient is φ = 20002668.

The previous prime is 40005337. The next prime is 40005347. The reversal of 40005338 is 83350004.

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., 27636049 + 12369289 = 5257^2 + 3517^2 .

It is not an unprimeable number, because it can be changed into a prime (40005331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001333 + ... + 10001336.

Almost surely, 2^40005338 is an apocalyptic number.

40005338 is a deficient number, since it is larger than the sum of its proper divisors (20002672).

40005338 is a wasteful number, since it uses less digits than its factorization.

40005338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20002671.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40005338 is about 6324.9773122123. The cubic root of 40005338 is about 342.0104017447.

The spelling of 40005338 in words is "forty million, five thousand, three hundred thirty-eight".