247888 has 10 divisors (see below), whose sum is σ = 480314. Its totient is φ = 123936.

The previous prime is 247879. The next prime is 247889. The reversal of 247888 is 888742.

It can be written as a sum of positive squares in only one way, i.e., 150544 + 97344 = 388^2 + 312^2 .

It is a super-2 number, since 2×247888² = 122896921088, which contains 22 as substring.

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247889) by changing a digit.

247888 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7731 + ... + 7762.

2²⁴⁷⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

247888 is a deficient number, since it is larger than the sum of its proper divisors (232426).

247888 is a wasteful number, since it uses less digits than its factorization.

247888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15501 (or 15495 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 247888 is about 497.8835205146. The cubic root of 247888 is about 62.8181537035.

The spelling of 247888 in words is "two hundred forty-seven thousand, eight hundred eighty-eight".