49971820 has 24 divisors (see below), whose sum is σ = 106722000. Its totient is φ = 19649472.

The previous prime is 49971811. The next prime is 49971827. The reversal of 49971820 is 2817994.

49971820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×49971820² = 4994365588224800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49971827) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19995 + ... + 22354.

It is an arithmetic number, because the mean of its divisors is an integer number (4446750).

Almost surely, 2^49971820 is an apocalyptic number.

It is an amenable number.

49971820 is an abundant number, since it is smaller than the sum of its proper divisors (56750180).

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

49971820 is a wasteful number, since it uses less digits than its factorization.

49971820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42417 (or 42415 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 49971820 is about 7069.0749041158. The cubic root of 49971820 is about 368.3339261858. Note that the first 3 decimals are identical.

The spelling of 49971820 in words is "forty-nine million, nine hundred seventy-one thousand, eight hundred twenty".