49809816 has 160 divisors (see below), whose sum is σ = 162624000. Its totient is φ = 13950144.

The previous prime is 49809803. The next prime is 49809827. The reversal of 49809816 is 61890894.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 358275 + ... + 358413.

It is an arithmetic number, because the mean of its divisors is an integer number (1016400).

Almost surely, 2^49809816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49809816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81312000).

49809816 is an abundant number, since it is smaller than the sum of its proper divisors (112814184).

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

49809816 is a wasteful number, since it uses less digits than its factorization.

49809816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 49809816 is about 7057.6069598696. The cubic root of 49809816 is about 367.9354604839.

It can be divided in two parts, 49809 and 816, that added together give a 4-th power (50625 = 15⁴).

The spelling of 49809816 in words is "forty-nine million, eight hundred nine thousand, eight hundred sixteen".