40459639 has 4 divisors (see below), whose sum is σ = 44137800. Its totient is φ = 36781480.

The previous prime is 40459637. The next prime is 40459649. The reversal of 40459639 is 93695404.

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 40459639 - 2¹ = 40459637 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40459631) 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, 1839064 + ... + 1839085.

It is an arithmetic number, because the mean of its divisors is an integer number (11034450).

Almost surely, 2^40459639 is an apocalyptic number.

40459639 is a deficient number, since it is larger than the sum of its proper divisors (3678161).

40459639 is a wasteful number, since it uses less digits than its factorization.

40459639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678160.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 40459639 is about 6360.7891805970. The cubic root of 40459639 is about 343.3001563023.

The spelling of 40459639 in words is "forty million, four hundred fifty-nine thousand, six hundred thirty-nine".