49142639 has 32 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 38144736.

The previous prime is 49142627. The next prime is 49142647. The reversal of 49142639 is 93624194.

It is not a de Polignac number, because 49142639 - 2¹⁶ = 49077103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49142609) 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 31 ways as a sum of consecutive naturals, for example, 459224 + ... + 459330.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^49142639 is an apocalyptic number.

49142639 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

49142639 is a deficient number, since it is larger than the sum of its proper divisors (13756561).

49142639 is a wasteful number, since it uses less digits than its factorization.

49142639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 230 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 49142639 is about 7010.1810960916. The cubic root of 49142639 is about 366.2853016484.

The spelling of 49142639 in words is "forty-nine million, one hundred forty-two thousand, six hundred thirty-nine".