247870 has 16 divisors (see below), whose sum is σ = 510048. Its totient is φ = 84960.

The previous prime is 247853. The next prime is 247873. The reversal of 247870 is 78742.

It is a super-2 number, since 2×247870² = 122879073800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247873) by changing a digit.

247870 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1701 + ... + 1840.

It is an arithmetic number, because the mean of its divisors is an integer number (31878).

2²⁴⁷⁸⁷⁰ is an apocalyptic number.

247870 is an abundant number, since it is smaller than the sum of its proper divisors (262178).

It is a weird number, because it is abundant, but not a pseudoperfect number.

247870 is a wasteful number, since it uses less digits than its factorization.

247870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 247870 is about 497.8654436693. The cubic root of 247870 is about 62.8166331859.

The spelling of 247870 in words is "two hundred forty-seven thousand, eight hundred seventy".