47405805 has 16 divisors (see below), whose sum is σ = 75936960. Its totient is φ = 25253888.

The previous prime is 47405803. The next prime is 47405821. The reversal of 47405805 is 50850474.

It is a cyclic number.

It is not a de Polignac number, because 47405805 - 2¹ = 47405803 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47405803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20014 + ... + 22256.

It is an arithmetic number, because the mean of its divisors is an integer number (4746060).

Almost surely, 2^47405805 is an apocalyptic number.

It is an amenable number.

47405805 is a deficient number, since it is larger than the sum of its proper divisors (28531155).

47405805 is a wasteful number, since it uses less digits than its factorization.

47405805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 47405805 is about 6885.1873612851. The cubic root of 47405805 is about 361.9182710807.

The spelling of 47405805 in words is "forty-seven million, four hundred five thousand, eight hundred five".