40549839 has 8 divisors (see below), whose sum is σ = 58981632. Its totient is φ = 24575640.

The previous prime is 40549813. The next prime is 40549841. The reversal of 40549839 is 93894504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40549839 - 2⁸ = 40549583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40549839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40549039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614359 + ... + 614424.

It is an arithmetic number, because the mean of its divisors is an integer number (7372704).

Almost surely, 2^40549839 is an apocalyptic number.

40549839 is a deficient number, since it is larger than the sum of its proper divisors (18431793).

40549839 is a wasteful number, since it uses less digits than its factorization.

40549839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228797.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 40549839 is about 6367.8755484070. The cubic root of 40549839 is about 343.5550827086. Note that the first 3 decimals are identical.

The spelling of 40549839 in words is "forty million, five hundred forty-nine thousand, eight hundred thirty-nine".