47317820 has 48 divisors (see below), whose sum is σ = 111349728. Its totient is φ = 16738560.

The previous prime is 47317789. The next prime is 47317843. The reversal of 47317820 is 2871374.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5234 + ... + 11046.

It is an arithmetic number, because the mean of its divisors is an integer number (2319786).

Almost surely, 2^47317820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47317820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55674864).

47317820 is an abundant number, since it is smaller than the sum of its proper divisors (64031908).

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

47317820 is a wasteful number, since it uses less digits than its factorization.

47317820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5870 (or 5868 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 47317820 is about 6878.7949526062. The cubic root of 47317820 is about 361.6942260872.

The spelling of 47317820 in words is "forty-seven million, three hundred seventeen thousand, eight hundred twenty".