47778631 has 8 divisors (see below), whose sum is σ = 49603680. Its totient is φ = 45965472.

The previous prime is 47778623. The next prime is 47778637. The reversal of 47778631 is 13687774.

47778631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47778631 - 2³ = 47778623 is a prime.

It is a super-2 number, since 2×47778631² = 4565595160468322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47778637) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5686 + ... + 11308.

It is an arithmetic number, because the mean of its divisors is an integer number (6200460).

Almost surely, 2^47778631 is an apocalyptic number.

47778631 is a deficient number, since it is larger than the sum of its proper divisors (1825049).

47778631 is a wasteful number, since it uses less digits than its factorization.

47778631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945.

The product of its digits is 197568, while the sum is 43.

The square root of 47778631 is about 6912.2088365442. The cubic root of 47778631 is about 362.8645711540.

The spelling of 47778631 in words is "forty-seven million, seven hundred seventy-eight thousand, six hundred thirty-one".