49081839 has 16 divisors (see below), whose sum is σ = 72306432. Its totient is φ = 29456768.

The previous prime is 49081787. The next prime is 49081861. The reversal of 49081839 is 93818094.

It is a cyclic number.

It is not a de Polignac number, because 49081839 - 2¹⁵ = 49049071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49081839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49081139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19749 + ... + 22094.

It is an arithmetic number, because the mean of its divisors is an integer number (4519152).

Almost surely, 2^49081839 is an apocalyptic number.

49081839 is a deficient number, since it is larger than the sum of its proper divisors (23224593).

49081839 is a wasteful number, since it uses less digits than its factorization.

49081839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41886.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 49081839 is about 7005.8432040690. The cubic root of 49081839 is about 366.1341814438.

The spelling of 49081839 in words is "forty-nine million, eighty-one thousand, eight hundred thirty-nine".