47864817 has 144 divisors (see below), whose sum is σ = 101888640. Its totient is φ = 21954240.

The previous prime is 47864813. The next prime is 47864827. The reversal of 47864817 is 71846874.

It is not a de Polignac number, because 47864817 - 2² = 47864813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47864813) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2081068 + ... + 2081090.

It is an arithmetic number, because the mean of its divisors is an integer number (707560).

Almost surely, 2^47864817 is an apocalyptic number.

It is an amenable number.

47864817 is an abundant number, since it is smaller than the sum of its proper divisors (54023823).

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

47864817 is a wasteful number, since it uses less digits than its factorization.

47864817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 57 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 47864817 is about 6918.4403589248. The cubic root of 47864817 is about 363.0826258194.

The spelling of 47864817 in words is "forty-seven million, eight hundred sixty-four thousand, eight hundred seventeen".