47985138 has 12 divisors (see below), whose sum is σ = 103967838. Its totient is φ = 15995040.

The previous prime is 47985131. The next prime is 47985143. The reversal of 47985138 is 83158974.

47985138 is a `hidden beast` number, since 47 + 98 + 513 + 8 = 666.

47985138 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 32798529 + 15186609 = 5727^2 + 3897^2 .

It is a junction number, because it is equal to n+sod(n) for n = 47985093 and 47985102.

It is not an unprimeable number, because it can be changed into a prime (47985131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1332903 + ... + 1332938.

Almost surely, 2^47985138 is an apocalyptic number.

47985138 is an abundant number, since it is smaller than the sum of its proper divisors (55982700).

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

47985138 is a wasteful number, since it uses less digits than its factorization.

47985138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665849 (or 2665846 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 47985138 is about 6927.1305747763. The cubic root of 47985138 is about 363.3866062970.

The spelling of 47985138 in words is "forty-seven million, nine hundred eighty-five thousand, one hundred thirty-eight".