47778534 has 24 divisors (see below), whose sum is σ = 109610280. Its totient is φ = 14989248.

The previous prime is 47778529. The next prime is 47778583. The reversal of 47778534 is 43587774.

47778534 is a `hidden beast` number, since 47 + 7 + 78 + 534 = 666.

47778534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×47778534² = 4565576622378312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47778534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77764 + ... + 78375.

It is an arithmetic number, because the mean of its divisors is an integer number (4567095).

Almost surely, 2^47778534 is an apocalyptic number.

47778534 is an abundant number, since it is smaller than the sum of its proper divisors (61831746).

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

47778534 is a wasteful number, since it uses less digits than its factorization.

47778534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156164 (or 156161 counting only the distinct ones).

The product of its digits is 658560, while the sum is 45.

The square root of 47778534 is about 6912.2018199702. The cubic root of 47778534 is about 362.8643255917.

The spelling of 47778534 in words is "forty-seven million, seven hundred seventy-eight thousand, five hundred thirty-four".