47939778 has 24 divisors (see below), whose sum is σ = 105574716. Its totient is φ = 15717600.

The previous prime is 47939743. The next prime is 47939789. The reversal of 47939778 is 87793974.

It can be written as a sum of positive squares in 2 ways, for example, as 47651409 + 288369 = 6903^2 + 537^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20733 + ... + 22928.

Almost surely, 2^47939778 is an apocalyptic number.

47939778 is an abundant number, since it is smaller than the sum of its proper divisors (57634938).

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

47939778 is a wasteful number, since it uses less digits than its factorization.

47939778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43730 (or 43727 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 47939778 is about 6923.8557177342. The cubic root of 47939778 is about 363.2720679649.

The spelling of 47939778 in words is "forty-seven million, nine hundred thirty-nine thousand, seven hundred seventy-eight".