49129978 has 32 divisors (see below), whose sum is σ = 80289792. Its totient is φ = 22479600.

The previous prime is 49129939. The next prime is 49129979. The reversal of 49129978 is 87992194.

It is not an unprimeable number, because it can be changed into a prime (49129979) 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 15 ways as a sum of consecutive naturals, for example, 186675 + ... + 186937.

It is an arithmetic number, because the mean of its divisors is an integer number (2509056).

Almost surely, 2^49129978 is an apocalyptic number.

49129978 is a deficient number, since it is larger than the sum of its proper divisors (31159814).

49129978 is a wasteful number, since it uses less digits than its factorization.

49129978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450.

The product of its digits is 326592, while the sum is 49.

The square root of 49129978 is about 7009.2779942017. The cubic root of 49129978 is about 366.2538426369.

The spelling of 49129978 in words is "forty-nine million, one hundred twenty-nine thousand, nine hundred seventy-eight".