47208778 has 4 divisors (see below), whose sum is σ = 70813170. Its totient is φ = 23604388.

The previous prime is 47208773. The next prime is 47208817. The reversal of 47208778 is 87780274.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24235929 + 22972849 = 4923^2 + 4793^2 .

It is not an unprimeable number, because it can be changed into a prime (47208773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11802193 + ... + 11802196.

Almost surely, 2^47208778 is an apocalyptic number.

47208778 is a deficient number, since it is larger than the sum of its proper divisors (23604392).

47208778 is a wasteful number, since it uses less digits than its factorization.

47208778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23604391.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 47208778 is about 6870.8644288765. The cubic root of 47208778 is about 361.4161758269.

The spelling of 47208778 in words is "forty-seven million, two hundred eight thousand, seven hundred seventy-eight".