47778458 has 16 divisors (see below), whose sum is σ = 88206720. Its totient is φ = 18901296.

The previous prime is 47778431. The next prime is 47778469. The reversal of 47778458 is 85487774.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131078 + ... + 131441.

It is an arithmetic number, because the mean of its divisors is an integer number (5512920).

Almost surely, 2^47778458 is an apocalyptic number.

47778458 is a deficient number, since it is larger than the sum of its proper divisors (40428262).

47778458 is a wasteful number, since it uses less digits than its factorization.

47778458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262541.

The product of its digits is 1756160, while the sum is 50.

The square root of 47778458 is about 6912.1963224434. The cubic root of 47778458 is about 362.8641331922.

The spelling of 47778458 in words is "forty-seven million, seven hundred seventy-eight thousand, four hundred fifty-eight".