47578887 has 16 divisors (see below), whose sum is σ = 70594560. Its totient is φ = 31671000.

The previous prime is 47578877. The next prime is 47578891. The reversal of 47578887 is 78887574.

It is not a de Polignac number, because 47578887 - 2⁶ = 47578823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47578877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30312 + ... + 31842.

It is an arithmetic number, because the mean of its divisors is an integer number (4412160).

Almost surely, 2^47578887 is an apocalyptic number.

47578887 is a deficient number, since it is larger than the sum of its proper divisors (23015673).

47578887 is a wasteful number, since it uses less digits than its factorization.

47578887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691 (or 2685 counting only the distinct ones).

The product of its digits is 3512320, while the sum is 54.

The square root of 47578887 is about 6897.7450663242. The cubic root of 47578887 is about 362.3581993145.

The spelling of 47578887 in words is "forty-seven million, five hundred seventy-eight thousand, eight hundred eighty-seven".