49981720 has 32 divisors (see below), whose sum is σ = 113889600. Its totient is φ = 19738368.

The previous prime is 49981699. The next prime is 49981787. The reversal of 49981720 is 2718994.

49981720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

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 7 ways as a sum of consecutive naturals, for example, 4749 + ... + 11068.

It is an arithmetic number, because the mean of its divisors is an integer number (3559050).

Almost surely, 2^49981720 is an apocalyptic number.

49981720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49981720 is an abundant number, since it is smaller than the sum of its proper divisors (63907880).

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

49981720 is a wasteful number, since it uses less digits than its factorization.

49981720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15907 (or 15903 counting only the distinct ones).

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

The square root of 49981720 is about 7069.7751025050. The cubic root of 49981720 is about 368.3582483277.

The spelling of 49981720 in words is "forty-nine million, nine hundred eighty-one thousand, seven hundred twenty".