47219778 has 24 divisors (see below), whose sum is σ = 108328428. Its totient is φ = 14813952.

The previous prime is 47219773. The next prime is 47219797. The reversal of 47219778 is 87791274.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46826649 + 393129 = 6843^2 + 627^2 .

It is not an unprimeable number, because it can be changed into a prime (47219773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76851 + ... + 77462.

Almost surely, 2^47219778 is an apocalyptic number.

47219778 is an abundant number, since it is smaller than the sum of its proper divisors (61108650).

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

47219778 is a wasteful number, since it uses less digits than its factorization.

47219778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154338 (or 154335 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 47219778 is about 6871.6648637721. The cubic root of 47219778 is about 361.4442445418. Note that the first 3 decimals are identical.

The spelling of 47219778 in words is "forty-seven million, two hundred nineteen thousand, seven hundred seventy-eight".