40738 has 4 divisors (see below), whose sum is σ = 61110. Its totient is φ = 20368.

The previous prime is 40709. The next prime is 40739. The reversal of 40738 is 83704.

40738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 31329 + 9409 = 177^2 + 97^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (40739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10183 + ... + 10186.

2⁴⁰⁷³⁸ is an apocalyptic number.

40738 is a deficient number, since it is larger than the sum of its proper divisors (20372).

40738 is a wasteful number, since it uses less digits than its factorization.

40738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20371.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 40738 is about 201.8365675491. The cubic root of 40738 is about 34.4085655613.

The spelling of 40738 in words is "forty thousand, seven hundred thirty-eight".