47455778 has 8 divisors (see below), whose sum is σ = 72919980. Its totient is φ = 23149120.

The previous prime is 47455777. The next prime is 47455781. The reversal of 47455778 is 87755474.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47375689 + 80089 = 6883^2 + 283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (47455777) 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 in 3 ways as a sum of consecutive naturals, for example, 289283 + ... + 289446.

Almost surely, 2^47455778 is an apocalyptic number.

47455778 is a deficient number, since it is larger than the sum of its proper divisors (25464202).

47455778 is a wasteful number, since it uses less digits than its factorization.

47455778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578772.

The product of its digits is 1097600, while the sum is 47.

The square root of 47455778 is about 6888.8154279237. The cubic root of 47455778 is about 362.0453989032.

The spelling of 47455778 in words is "forty-seven million, four hundred fifty-five thousand, seven hundred seventy-eight".