47778488 has 8 divisors (see below), whose sum is σ = 89584680. Its totient is φ = 23889240.

The previous prime is 47778487. The next prime is 47778499. The reversal of 47778488 is 88487774.

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

It is a super-2 number, since 2×47778488² = 4565567831132288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47778481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2986148 + ... + 2986163.

It is an arithmetic number, because the mean of its divisors is an integer number (11198085).

Almost surely, 2^47778488 is an apocalyptic number.

It is an amenable number.

47778488 is a deficient number, since it is larger than the sum of its proper divisors (41806192).

47778488 is a wasteful number, since it uses less digits than its factorization.

47778488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5972317 (or 5972313 counting only the distinct ones).

The product of its digits is 2809856, while the sum is 53.

The square root of 47778488 is about 6912.1984925203. The cubic root of 47778488 is about 362.8642091394.

The spelling of 47778488 in words is "forty-seven million, seven hundred seventy-eight thousand, four hundred eighty-eight".