49721508 has 18 divisors (see below), whose sum is σ = 125685014. Its totient is φ = 16573824.

The previous prime is 49721491. The next prime is 49721519. The reversal of 49721508 is 80512794.

49721508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 49449024 + 272484 = 7032^2 + 522^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1381153 = 49721508 / (4 + 9 + 7 + 2 + 1 + 5 + 0 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 690541 + ... + 690612.

Almost surely, 2^49721508 is an apocalyptic number.

It is an amenable number.

49721508 is an abundant number, since it is smaller than the sum of its proper divisors (75963506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49721508 is a wasteful number, since it uses less digits than its factorization.

49721508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381163 (or 1381158 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 49721508 is about 7051.3479562421. The cubic root of 49721508 is about 367.7178938293.

The spelling of 49721508 in words is "forty-nine million, seven hundred twenty-one thousand, five hundred eight".