40844639 has 12 divisors (see below), whose sum is σ = 46347840. Its totient is φ = 35930400.

The previous prime is 40844603. The next prime is 40844717. The reversal of 40844639 is 93644804.

It is not a de Polignac number, because 40844639 - 2¹² = 40840543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40844039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1694 + ... + 9195.

It is an arithmetic number, because the mean of its divisors is an integer number (3862320).

Almost surely, 2^40844639 is an apocalyptic number.

40844639 is a deficient number, since it is larger than the sum of its proper divisors (5503201).

40844639 is a wasteful number, since it uses less digits than its factorization.

40844639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10942 (or 10931 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 40844639 is about 6390.9810670976. The cubic root of 40844639 is about 344.3856292647.

The spelling of 40844639 in words is "forty million, eight hundred forty-four thousand, six hundred thirty-nine".