47285381 has 32 divisors (see below), whose sum is σ = 60092928. Its totient is φ = 36541440.

The previous prime is 47285369. The next prime is 47285389. The reversal of 47285381 is 18358274.

It is not a de Polignac number, because 47285381 - 2¹⁸ = 47023237 is a prime.

It is a super-2 number, since 2×47285381² = 4471814512630322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47285389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128660 + ... + 129026.

It is an arithmetic number, because the mean of its divisors is an integer number (1877904).

Almost surely, 2^47285381 is an apocalyptic number.

It is an amenable number.

47285381 is a deficient number, since it is larger than the sum of its proper divisors (12807547).

47285381 is a wasteful number, since it uses less digits than its factorization.

47285381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its digits is 53760, while the sum is 38.

The square root of 47285381 is about 6876.4366498936. The cubic root of 47285381 is about 361.6115533490.

The spelling of 47285381 in words is "forty-seven million, two hundred eighty-five thousand, three hundred eighty-one".