40420239 has 16 divisors (see below), whose sum is σ = 57072000. Its totient is φ = 25374816.

The previous prime is 40420231. The next prime is 40420241. The reversal of 40420239 is 93202404.

It is a happy number.

40420239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40420239 - 2³ = 40420231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7812 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (3567000).

Almost surely, 2^40420239 is an apocalyptic number.

40420239 is a deficient number, since it is larger than the sum of its proper divisors (16651761).

40420239 is a wasteful number, since it uses less digits than its factorization.

40420239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4294.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 40420239 is about 6357.6913262599. The cubic root of 40420239 is about 343.1886837380.

The spelling of 40420239 in words is "forty million, four hundred twenty thousand, two hundred thirty-nine".