47384781 has 8 divisors (see below), whose sum is σ = 63507840. Its totient is φ = 31425792.

The previous prime is 47384773. The next prime is 47384819. The reversal of 47384781 is 18748374.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47384781 - 2³ = 47384773 is a prime.

It is a super-2 number, since 2×47384781² = 4490634940835922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47384731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40341 + ... + 41498.

It is an arithmetic number, because the mean of its divisors is an integer number (7938480).

Almost surely, 2^47384781 is an apocalyptic number.

It is an amenable number.

47384781 is a deficient number, since it is larger than the sum of its proper divisors (16123059).

47384781 is a wasteful number, since it uses less digits than its factorization.

47384781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82035.

The product of its digits is 150528, while the sum is 42.

The square root of 47384781 is about 6883.6604361343. The cubic root of 47384781 is about 361.8647607926.

The spelling of 47384781 in words is "forty-seven million, three hundred eighty-four thousand, seven hundred eighty-one".