47981768 has 8 divisors (see below), whose sum is σ = 89965830. Its totient is φ = 23990880.

The previous prime is 47981761. The next prime is 47981771. The reversal of 47981768 is 86718974.

It can be written as a sum of positive squares in only one way, i.e., 36024004 + 11957764 = 6002^2 + 3458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (47981761) by changing a digit.

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 as a sum of consecutive naturals, namely, 2998853 + ... + 2998868.

Almost surely, 2^47981768 is an apocalyptic number.

It is an amenable number.

47981768 is a deficient number, since it is larger than the sum of its proper divisors (41984062).

47981768 is a wasteful number, since it uses less digits than its factorization.

47981768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5997727 (or 5997723 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The square root of 47981768 is about 6926.8873240439. The cubic root of 47981768 is about 363.3780992079.

The spelling of 47981768 in words is "forty-seven million, nine hundred eighty-one thousand, seven hundred sixty-eight".