47771878 has 32 divisors (see below), whose sum is σ = 89890560. Its totient is φ = 18497760.

The previous prime is 47771869. The next prime is 47771917. The reversal of 47771878 is 87817774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26700 + ... + 28432.

It is an arithmetic number, because the mean of its divisors is an integer number (2809080).

Almost surely, 2^47771878 is an apocalyptic number.

47771878 is a deficient number, since it is larger than the sum of its proper divisors (42118682).

47771878 is a wasteful number, since it uses less digits than its factorization.

47771878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its digits is 614656, while the sum is 49.

The square root of 47771878 is about 6911.7203357775. The cubic root of 47771878 is about 362.8474746693.

The spelling of 47771878 in words is "forty-seven million, seven hundred seventy-one thousand, eight hundred seventy-eight".