47777538 has 8 divisors (see below), whose sum is σ = 95555088. Its totient is φ = 15925844.

The previous prime is 47777537. The next prime is 47777557. The reversal of 47777538 is 83577774.

It is a happy number.

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

47777538 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47777537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3981456 + ... + 3981467.

It is an arithmetic number, because the mean of its divisors is an integer number (11944386).

Almost surely, 2^47777538 is an apocalyptic number.

47777538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

47777538 is a wasteful number, since it uses less digits than its factorization.

47777538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7962928.

The product of its digits is 1152480, while the sum is 48.

The square root of 47777538 is about 6912.1297730873. The cubic root of 47777538 is about 362.8618041290.

The spelling of 47777538 in words is "forty-seven million, seven hundred seventy-seven thousand, five hundred thirty-eight".