49988978 has 16 divisors (see below), whose sum is σ = 81392640. Its totient is φ = 22888656.

The previous prime is 49988977. The next prime is 49989007. The reversal of 49988978 is 87988994.

It is a self number, because there is not a number n which added to its sum of digits gives 49988978.

It is not an unprimeable number, because it can be changed into a prime (49988977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4268 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (5087040).

Almost surely, 2^49988978 is an apocalyptic number.

49988978 is a deficient number, since it is larger than the sum of its proper divisors (31403662).

49988978 is a wasteful number, since it uses less digits than its factorization.

49988978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15281.

The product of its digits is 10450944, while the sum is 62.

The square root of 49988978 is about 7070.2883958153. The cubic root of 49988978 is about 368.3760776112.

The spelling of 49988978 in words is "forty-nine million, nine hundred eighty-eight thousand, nine hundred seventy-eight".