47778888 has 16 divisors (see below), whose sum is σ = 119447280. Its totient is φ = 15926288.

The previous prime is 47778881. The next prime is 47778911. The reversal of 47778888 is 88887774.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (47778881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995370 + ... + 995417.

It is an arithmetic number, because the mean of its divisors is an integer number (7465455).

Almost surely, 2^47778888 is an apocalyptic number.

It is an amenable number.

47778888 is an abundant number, since it is smaller than the sum of its proper divisors (71668392).

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

47778888 is a wasteful number, since it uses less digits than its factorization.

47778888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990796 (or 1990792 counting only the distinct ones).

The product of its digits is 5619712, while the sum is 57.

The square root of 47778888 is about 6912.2274268140. The cubic root of 47778888 is about 362.8652217658.

The spelling of 47778888 in words is "forty-seven million, seven hundred seventy-eight thousand, eight hundred eighty-eight".