49921278 has 32 divisors (see below), whose sum is σ = 109952640. Its totient is φ = 14984160.

The previous prime is 49921271. The next prime is 49921297. The reversal of 49921278 is 87212994.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49921271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3528 + ... + 10596.

It is an arithmetic number, because the mean of its divisors is an integer number (3436020).

Almost surely, 2^49921278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49921278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54976320).

49921278 is an abundant number, since it is smaller than the sum of its proper divisors (60031362).

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

49921278 is a wasteful number, since it uses less digits than its factorization.

49921278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7192.

The product of its digits is 72576, while the sum is 42.

The square root of 49921278 is about 7065.4991331115. The cubic root of 49921278 is about 368.2097054212.

The spelling of 49921278 in words is "forty-nine million, nine hundred twenty-one thousand, two hundred seventy-eight".