47985578 has 4 divisors (see below), whose sum is σ = 71978370. Its totient is φ = 23992788.

The previous prime is 47985557. The next prime is 47985593. The reversal of 47985578 is 87558974.

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., 38725729 + 9259849 = 6223^2 + 3043^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11996393 + ... + 11996396.

Almost surely, 2^47985578 is an apocalyptic number.

47985578 is a deficient number, since it is larger than the sum of its proper divisors (23992792).

47985578 is a wasteful number, since it uses less digits than its factorization.

47985578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23992791.

The product of its digits is 2822400, while the sum is 53.

The square root of 47985578 is about 6927.1623338854. The cubic root of 47985578 is about 363.3877169855.

The spelling of 47985578 in words is "forty-seven million, nine hundred eighty-five thousand, five hundred seventy-eight".