47288385 has 12 divisors (see below), whose sum is σ = 81966612. Its totient is φ = 25220448.

The previous prime is 47288377. The next prime is 47288387. The reversal of 47288385 is 58388274.

It can be written as a sum of positive squares in 2 ways, for example, as 19820304 + 27468081 = 4452^2 + 5241^2 .

It is not a de Polignac number, because 47288385 - 2³ = 47288377 is a prime.

It is a super-3 number, since 3×47288385³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1050853 = 47288385 / (4 + 7 + 2 + 8 + 8 + 3 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 47288385.

It is not an unprimeable number, because it can be changed into a prime (47288387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525382 + ... + 525471.

It is an arithmetic number, because the mean of its divisors is an integer number (6830551).

Almost surely, 2^47288385 is an apocalyptic number.

47288385 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47288385 is a deficient number, since it is larger than the sum of its proper divisors (34678227).

47288385 is a wasteful number, since it uses less digits than its factorization.

47288385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050864 (or 1050861 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 47288385 is about 6876.6550735078. The cubic root of 47288385 is about 361.6192108116.

The spelling of 47288385 in words is "forty-seven million, two hundred eighty-eight thousand, three hundred eighty-five".