247860 has 84 divisors (see below), whose sum is σ = 826308. Its totient is φ = 62208.

The previous prime is 247853. The next prime is 247873. The reversal of 247860 is 68742.

It can be written as a sum of positive squares in 2 ways, for example, as 142884 + 104976 = 378^2 + 324^2 .

It is a super-2 number, since 2×247860² = 122869159200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 14572 + ... + 14588.

It is an arithmetic number, because the mean of its divisors is an integer number (9837).

2²⁴⁷⁸⁶⁰ is an apocalyptic number.

247860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413154).

247860 is an abundant number, since it is smaller than the sum of its proper divisors (578448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247860 is a wasteful number, since it uses less digits than its factorization.

247860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 247860 is about 497.8554006938. The cubic root of 247860 is about 62.8157884222.

247860 divided by its sum of digits (27) gives a triangular number (9180 = T₁₃₅).

The spelling of 247860 in words is "two hundred forty-seven thousand, eight hundred sixty".