47787668 has 6 divisors (see below), whose sum is σ = 83628426. Its totient is φ = 23893832.

The previous prime is 47787667. The next prime is 47787689. The reversal of 47787668 is 86678774.

47787668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 29571844 + 18215824 = 5438^2 + 4268^2 .

It is a super-2 number, since 2×47787668² = 4567322425756448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47787667) 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 as a sum of consecutive naturals, namely, 5973455 + ... + 5973462.

It is an arithmetic number, because the mean of its divisors is an integer number (13938071).

Almost surely, 2^47787668 is an apocalyptic number.

It is an amenable number.

47787668 is a deficient number, since it is larger than the sum of its proper divisors (35840758).

47787668 is a wasteful number, since it uses less digits than its factorization.

47787668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11946921 (or 11946919 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 53.

The square root of 47787668 is about 6912.8625040572. The cubic root of 47787668 is about 362.8874474925.

It can be divided in two parts, 4778766 and 8, that added together give a palindrome (4778774).

The spelling of 47787668 in words is "forty-seven million, seven hundred eighty-seven thousand, six hundred sixty-eight".