40239938 has 4 divisors (see below), whose sum is σ = 60359910. Its totient is φ = 20119968.

The previous prime is 40239923. The next prime is 40239961. The reversal of 40239938 is 83993204.

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., 40157569 + 82369 = 6337^2 + 287^2 .

It is a super-2 number, since 2×40239938² = 3238505220487688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10059983 + ... + 10059986.

Almost surely, 2^40239938 is an apocalyptic number.

40239938 is a deficient number, since it is larger than the sum of its proper divisors (20119972).

40239938 is a wasteful number, since it uses less digits than its factorization.

40239938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20119971.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 40239938 is about 6343.4957239680. The cubic root of 40239938 is about 342.6776402807.

The spelling of 40239938 in words is "forty million, two hundred thirty-nine thousand, nine hundred thirty-eight".