47840256 has 132 divisors (see below), whose sum is σ = 143699400. Its totient is φ = 15310848.

The previous prime is 47840249. The next prime is 47840257. The reversal of 47840256 is 65204874.

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

It is a self number, because there is not a number n which added to its sum of digits gives 47840256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47840257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267175 + ... + 267353.

Almost surely, 2^47840256 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 47840256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71849700).

47840256 is an abundant number, since it is smaller than the sum of its proper divisors (95859144).

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

47840256 is a wasteful number, since it uses less digits than its factorization.

47840256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 47840256 is about 6916.6650923693. The cubic root of 47840256 is about 363.0205120117.

The spelling of 47840256 in words is "forty-seven million, eight hundred forty thousand, two hundred fifty-six".