49857720 has 128 divisors (see below), whose sum is σ = 165162240. Its totient is φ = 11939840.

The previous prime is 49857713. The next prime is 49857733. The reversal of 49857720 is 2775894.

49857720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 7061²-1.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141064 + ... + 141416.

It is an arithmetic number, because the mean of its divisors is an integer number (1290330).

Almost surely, 2^49857720 is an apocalyptic number.

49857720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49857720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82581120).

49857720 is an abundant number, since it is smaller than the sum of its proper divisors (115304520).

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

49857720 is a wasteful number, since it uses less digits than its factorization.

49857720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 49857720 is about 7060.9999291885. Note that the first 4 decimals coincide. The cubic root of 49857720 is about 368.0533752133.

The spelling of 49857720 in words is "forty-nine million, eight hundred fifty-seven thousand, seven hundred twenty".