47778156 has 36 divisors (see below), whose sum is σ = 121112992. Its totient is φ = 15881184.

The previous prime is 47778139. The next prime is 47778187. The reversal of 47778156 is 65187774.

It is a tau number, because it is divible by the number of its divisors (36).

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, 12621 + ... + 15963.

Almost surely, 2^47778156 is an apocalyptic number.

It is an amenable number.

47778156 is an abundant number, since it is smaller than the sum of its proper divisors (73334836).

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

47778156 is a wasteful number, since it uses less digits than its factorization.

47778156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750 (or 3745 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 47778156 is about 6912.1744769645. The cubic root of 47778156 is about 362.8633686552.

The spelling of 47778156 in words is "forty-seven million, seven hundred seventy-eight thousand, one hundred fifty-six".