47777778 has 24 divisors (see below), whose sum is σ = 104832000. Its totient is φ = 15723864.

The previous prime is 47777749. The next prime is 47777783. The reversal of 47777778 is 87777774.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15378 + ... + 18221.

It is an arithmetic number, because the mean of its divisors is an integer number (4368000).

Almost surely, 2^47777778 is an apocalyptic number.

47777778 is an abundant number, since it is smaller than the sum of its proper divisors (57054222).

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

47777778 is a wasteful number, since it uses less digits than its factorization.

47777778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33686 (or 33683 counting only the distinct ones).

The product of its digits is 3764768, while the sum is 54.

The square root of 47777778 is about 6912.1471338507. The cubic root of 47777778 is about 362.8624117136.

The spelling of 47777778 in words is "forty-seven million, seven hundred seventy-seven thousand, seven hundred seventy-eight".