47891285 has 16 divisors (see below), whose sum is σ = 62744304. Its totient is φ = 34877952.

The previous prime is 47891269. The next prime is 47891287. The reversal of 47891285 is 58219874.

It can be written as a sum of positive squares in 8 ways, for example, as 2436721 + 45454564 = 1561^2 + 6742^2 .

It is a cyclic number.

It is not a de Polignac number, because 47891285 - 2⁴ = 47891269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47891287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302 + ... + 9791.

It is an arithmetic number, because the mean of its divisors is an integer number (3921519).

Almost surely, 2^47891285 is an apocalyptic number.

It is an amenable number.

47891285 is a deficient number, since it is larger than the sum of its proper divisors (14853019).

47891285 is a wasteful number, since it uses less digits than its factorization.

47891285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10184.

The product of its digits is 161280, while the sum is 44.

The square root of 47891285 is about 6920.3529534266. The cubic root of 47891285 is about 363.1495385730.

The spelling of 47891285 in words is "forty-seven million, eight hundred ninety-one thousand, two hundred eighty-five".