47847840 has 96 divisors (see below), whose sum is σ = 152663616. Its totient is φ = 12595200.

The previous prime is 47847803. The next prime is 47847847. The reversal of 47847840 is 4874874.

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

It is a junction number, because it is equal to n+sod(n) for n = 47847792 and 47847801.

It is not an unprimeable number, because it can be changed into a prime (47847847) by changing a digit.

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, 39240 + ... + 40440.

It is an arithmetic number, because the mean of its divisors is an integer number (1590246).

Almost surely, 2^47847840 is an apocalyptic number.

47847840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47847840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76331808).

47847840 is an abundant number, since it is smaller than the sum of its proper divisors (104815776).

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

47847840 is a wasteful number, since it uses less digits than its factorization.

47847840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 42.

The square root of 47847840 is about 6917.2133117318. The cubic root of 47847840 is about 363.0396939192.

The spelling of 47847840 in words is "forty-seven million, eight hundred forty-seven thousand, eight hundred forty".