49997778 has 48 divisors (see below), whose sum is σ = 108301536. Its totient is φ = 15376320.

The previous prime is 49997771. The next prime is 49997803. The reversal of 49997778 is 87779994.

It is not an unprimeable number, because it can be changed into a prime (49997771) 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 23 ways as a sum of consecutive naturals, for example, 88525 + ... + 89087.

It is an arithmetic number, because the mean of its divisors is an integer number (2256282).

Almost surely, 2^49997778 is an apocalyptic number.

49997778 is an abundant number, since it is smaller than the sum of its proper divisors (58303758).

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

49997778 is a wasteful number, since it uses less digits than its factorization.

49997778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 628 counting only the distinct ones).

The product of its digits is 8001504, while the sum is 60.

The square root of 49997778 is about 7070.9106909931. The cubic root of 49997778 is about 368.3976925045.

The spelling of 49997778 in words is "forty-nine million, nine hundred ninety-seven thousand, seven hundred seventy-eight".