47778906 has 32 divisors (see below), whose sum is σ = 110845440. Its totient is φ = 13446576.

The previous prime is 47778881. The next prime is 47778911. The reversal of 47778906 is 60987774.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5676 + ... + 11303.

It is an arithmetic number, because the mean of its divisors is an integer number (3463920).

Almost surely, 2^47778906 is an apocalyptic number.

47778906 is an abundant number, since it is smaller than the sum of its proper divisors (63066534).

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

47778906 is a wasteful number, since it uses less digits than its factorization.

47778906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17058.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 47778906 is about 6912.2287288544. The cubic root of 47778906 is about 362.8652673339.

It can be divided in two parts, 47778 and 906, that added together give a palindrome (48684).

The spelling of 47778906 in words is "forty-seven million, seven hundred seventy-eight thousand, nine hundred six".