47217944 has 16 divisors (see below), whose sum is σ = 88607520. Its totient is φ = 23589280.

The previous prime is 47217941. The next prime is 47217949. The reversal of 47217944 is 44971274.

It is a junction number, because it is equal to n+sod(n) for n = 47217898 and 47217907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47217941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15074 + ... + 17934.

It is an arithmetic number, because the mean of its divisors is an integer number (5537970).

Almost surely, 2^47217944 is an apocalyptic number.

It is an amenable number.

47217944 is a deficient number, since it is larger than the sum of its proper divisors (41389576).

47217944 is a wasteful number, since it uses less digits than its factorization.

47217944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4930 (or 4926 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 47217944 is about 6871.5314159218. The cubic root of 47217944 is about 361.4395650243.

The spelling of 47217944 in words is "forty-seven million, two hundred seventeen thousand, nine hundred forty-four".