47216844 has 72 divisors (see below), whose sum is σ = 127848448. Its totient is φ = 15221520.

The previous prime is 47216839. The next prime is 47216849. The reversal of 47216844 is 44861274.

It is an interprime number because it is at equal distance from previous prime (47216839) and next prime (47216849).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47216799 and 47216808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47216849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29349 + ... + 30915.

Almost surely, 2^47216844 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 47216844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63924224).

47216844 is an abundant number, since it is smaller than the sum of its proper divisors (80631604).

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

47216844 is a wasteful number, since it uses less digits than its factorization.

47216844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617 (or 1603 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 47216844 is about 6871.4513750735. The cubic root of 47216844 is about 361.4367582763.

The spelling of 47216844 in words is "forty-seven million, two hundred sixteen thousand, eight hundred forty-four".