47075818 has 4 divisors (see below), whose sum is σ = 70613730. Its totient is φ = 23537908.

The previous prime is 47075801. The next prime is 47075843. The reversal of 47075818 is 81857074.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28697449 + 18378369 = 5357^2 + 4287^2 .

It is a super-2 number, since 2×47075818² = 4432265280738248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11768953 + ... + 11768956.

Almost surely, 2^47075818 is an apocalyptic number.

47075818 is a deficient number, since it is larger than the sum of its proper divisors (23537912).

47075818 is a wasteful number, since it uses less digits than its factorization.

47075818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23537911.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 47075818 is about 6861.1819681451. The cubic root of 47075818 is about 361.0765562272.

The spelling of 47075818 in words is "forty-seven million, seventy-five thousand, eight hundred eighteen".