47978220 has 24 divisors (see below), whose sum is σ = 134339184. Its totient is φ = 12794176.

The previous prime is 47978219. The next prime is 47978243. The reversal of 47978220 is 2287974.

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, 399759 + ... + 399878.

It is an arithmetic number, because the mean of its divisors is an integer number (5597466).

Almost surely, 2^47978220 is an apocalyptic number.

It is an amenable number.

47978220 is an abundant number, since it is smaller than the sum of its proper divisors (86360964).

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

47978220 is a wasteful number, since it uses less digits than its factorization.

47978220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799649 (or 799647 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 47978220 is about 6926.6312158220. The cubic root of 47978220 is about 363.3691423525.

The spelling of 47978220 in words is "forty-seven million, nine hundred seventy-eight thousand, two hundred twenty".