47729868 has 12 divisors (see below), whose sum is σ = 111369720. Its totient is φ = 15909952.

The previous prime is 47729867. The next prime is 47729893. The reversal of 47729868 is 86892774.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 47729868.

It is not an unprimeable number, because it can be changed into a prime (47729861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1988733 + ... + 1988756.

It is an arithmetic number, because the mean of its divisors is an integer number (9280810).

Almost surely, 2^47729868 is an apocalyptic number.

It is an amenable number.

47729868 is an abundant number, since it is smaller than the sum of its proper divisors (63639852).

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

47729868 is a wasteful number, since it uses less digits than its factorization.

47729868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977496 (or 3977494 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 47729868 is about 6908.6806265741. The cubic root of 47729868 is about 362.7410822792.

The spelling of 47729868 in words is "forty-seven million, seven hundred twenty-nine thousand, eight hundred sixty-eight".