47278881 has 24 divisors (see below), whose sum is σ = 73784256. Its totient is φ = 29000160.

The previous prime is 47278877. The next prime is 47278901. The reversal of 47278881 is 18887274.

It is not a de Polignac number, because 47278881 - 2² = 47278877 is a prime.

It is a super-2 number, since 2×47278881² = 4470585177224322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47278841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57036 + ... + 57858.

It is an arithmetic number, because the mean of its divisors is an integer number (3074344).

Almost surely, 2^47278881 is an apocalyptic number.

It is an amenable number.

47278881 is a deficient number, since it is larger than the sum of its proper divisors (26505375).

47278881 is a wasteful number, since it uses less digits than its factorization.

47278881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1330 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 47278881 is about 6875.9640051414. The cubic root of 47278881 is about 361.5949831621.

The spelling of 47278881 in words is "forty-seven million, two hundred seventy-eight thousand, eight hundred eighty-one".