47309856 has 96 divisors (see below), whose sum is σ = 137604096. Its totient is φ = 14112000.

The previous prime is 47309851. The next prime is 47309869. The reversal of 47309856 is 65890374.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (47309851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74661 + ... + 75291.

It is an arithmetic number, because the mean of its divisors is an integer number (1433376).

Almost surely, 2^47309856 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 47309856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68802048).

47309856 is an abundant number, since it is smaller than the sum of its proper divisors (90294240).

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

47309856 is a wasteful number, since it uses less digits than its factorization.

47309856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 47309856 is about 6878.2160477845. The cubic root of 47309856 is about 361.6739328556.

It can be divided in two parts, 47 and 309856, that added together give a palindrome (309903).

The spelling of 47309856 in words is "forty-seven million, three hundred nine thousand, eight hundred fifty-six".