47281818 has 16 divisors (see below), whose sum is σ = 94865760. Its totient is φ = 15710256.

The previous prime is 47281807. The next prime is 47281847. The reversal of 47281818 is 81818274.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10528 + ... + 14331.

It is an arithmetic number, because the mean of its divisors is an integer number (5929110).

Almost surely, 2^47281818 is an apocalyptic number.

47281818 is an abundant number, since it is smaller than the sum of its proper divisors (47583942).

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

47281818 is a wasteful number, since it uses less digits than its factorization.

47281818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25181.

The product of its digits is 28672, while the sum is 39.

The square root of 47281818 is about 6876.1775718781. The cubic root of 47281818 is about 361.6024705254.

The spelling of 47281818 in words is "forty-seven million, two hundred eighty-one thousand, eight hundred eighteen".