40239937 has 6 divisors (see below), whose sum is σ = 40645122. Its totient is φ = 39838752.

The previous prime is 40239923. The next prime is 40239961. The reversal of 40239937 is 73993204.

It can be written as a sum of positive squares in only one way, i.e., 28686736 + 11553201 = 5356^2 + 3399^2 .

It is not a de Polignac number, because 40239937 - 2¹⁹ = 39715649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40239896 and 40239905.

It is not an unprimeable number, because it can be changed into a prime (40239337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8713 + ... + 12505.

It is an arithmetic number, because the mean of its divisors is an integer number (6774187).

Almost surely, 2^40239937 is an apocalyptic number.

It is an amenable number.

40239937 is a deficient number, since it is larger than the sum of its proper divisors (405185).

40239937 is an equidigital number, since it uses as much as digits as its factorization.

40239937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999 (or 3896 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 40239937 is about 6343.4956451471. The cubic root of 40239937 is about 342.6776374421.

The spelling of 40239937 in words is "forty million, two hundred thirty-nine thousand, nine hundred thirty-seven".