40002239 has 4 divisors (see below), whose sum is σ = 42107640. Its totient is φ = 37896840.

The previous prime is 40002233. The next prime is 40002247. The reversal of 40002239 is 93220004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40002239 - 2¹² = 39998143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40002239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40002233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052672 + ... + 1052709.

It is an arithmetic number, because the mean of its divisors is an integer number (10526910).

Almost surely, 2^40002239 is an apocalyptic number.

40002239 is a deficient number, since it is larger than the sum of its proper divisors (2105401).

40002239 is a wasteful number, since it uses less digits than its factorization.

40002239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105400.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40002239 is about 6324.7323263518. The cubic root of 40002239 is about 342.0015702765.

The spelling of 40002239 in words is "forty million, two thousand, two hundred thirty-nine".