49621778 has 8 divisors (see below), whose sum is σ = 74464572. Its totient is φ = 24800256.

The previous prime is 49621769. The next prime is 49621807. The reversal of 49621778 is 87712694.

49621778 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 2 ways, for example, as 49378729 + 243049 = 7027^2 + 493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 3326 + ... + 10502.

Almost surely, 2^49621778 is an apocalyptic number.

49621778 is a deficient number, since it is larger than the sum of its proper divisors (24842794).

49621778 is a wasteful number, since it uses less digits than its factorization.

49621778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10636.

The product of its digits is 169344, while the sum is 44.

The square root of 49621778 is about 7044.2727090879. The cubic root of 49621778 is about 367.4718765404.

The spelling of 49621778 in words is "forty-nine million, six hundred twenty-one thousand, seven hundred seventy-eight".