49891778 has 16 divisors (see below), whose sum is σ = 76836600. Its totient is φ = 24288000.

The previous prime is 49891763. The next prime is 49891781. The reversal of 49891778 is 87719894.

49891778 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 4 ways, for example, as 36881329 + 13010449 = 6073^2 + 3607^2 .

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 7 ways as a sum of consecutive naturals, for example, 10298 + ... + 14346.

Almost surely, 2^49891778 is an apocalyptic number.

49891778 is a deficient number, since it is larger than the sum of its proper divisors (26944822).

49891778 is a wasteful number, since it uses less digits than its factorization.

49891778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213.

The product of its digits is 1016064, while the sum is 53.

The square root of 49891778 is about 7063.4112155530. The cubic root of 49891778 is about 368.1371623624.

The spelling of 49891778 in words is "forty-nine million, eight hundred ninety-one thousand, seven hundred seventy-eight".