49657578 has 16 divisors (see below), whose sum is σ = 105157440. Its totient is φ = 15578816.

The previous prime is 49657577. The next prime is 49657603. The reversal of 49657578 is 87575694.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 49657578.

It is not an unprimeable number, because it can be changed into a prime (49657571) 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, 243318 + ... + 243521.

It is an arithmetic number, because the mean of its divisors is an integer number (6572340).

Almost surely, 2^49657578 is an apocalyptic number.

49657578 is an abundant number, since it is smaller than the sum of its proper divisors (55499862).

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

49657578 is a wasteful number, since it uses less digits than its factorization.

49657578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486861.

The product of its digits is 2116800, while the sum is 51.

The square root of 49657578 is about 7046.8133223465. The cubic root of 49657578 is about 367.5602270676.

The spelling of 49657578 in words is "forty-nine million, six hundred fifty-seven thousand, five hundred seventy-eight".