49806978 has 64 divisors (see below), whose sum is σ = 112613760. Its totient is φ = 14579712.

The previous prime is 49806971. The next prime is 49807003. The reversal of 49806978 is 87960894.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49806978.

It is not an unprimeable number, because it can be changed into a prime (49806971) 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 31 ways as a sum of consecutive naturals, for example, 219301 + ... + 219527.

It is an arithmetic number, because the mean of its divisors is an integer number (1759590).

Almost surely, 2^49806978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49806978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56306880).

49806978 is an abundant number, since it is smaller than the sum of its proper divisors (62806782).

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

49806978 is a wasteful number, since it uses less digits than its factorization.

49806978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 49806978 is about 7057.4058973535. The cubic root of 49806978 is about 367.9284724325.

The spelling of 49806978 in words is "forty-nine million, eight hundred six thousand, nine hundred seventy-eight".