47138540 has 12 divisors (see below), whose sum is σ = 98990976. Its totient is φ = 18855408.

The previous prime is 47138537. The next prime is 47138557. The reversal of 47138540 is 4583174.

It is a junction number, because it is equal to n+sod(n) for n = 47138497 and 47138506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178444 + ... + 1178483.

It is an arithmetic number, because the mean of its divisors is an integer number (8249248).

Almost surely, 2^47138540 is an apocalyptic number.

It is an amenable number.

47138540 is an abundant number, since it is smaller than the sum of its proper divisors (51852436).

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

47138540 is a wasteful number, since it uses less digits than its factorization.

47138540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356936 (or 2356934 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 47138540 is about 6865.7512334777. The cubic root of 47138540 is about 361.2368465416.

The spelling of 47138540 in words is "forty-seven million, one hundred thirty-eight thousand, five hundred forty".