247804 has 12 divisors (see below), whose sum is σ = 444528. Its totient is φ = 120800.

The previous prime is 247799. The next prime is 247811. The reversal of 247804 is 408742.

It is a super-2 number, since 2×247804² = 122813644832, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a zygodrome in base 2 and base 14.

It is a congruent number.

It is an unprimeable number.

247804 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592 + ... + 919.

It is an arithmetic number, because the mean of its divisors is an integer number (37044).

2²⁴⁷⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

247804 is a deficient number, since it is larger than the sum of its proper divisors (196724).

247804 is a wasteful number, since it uses less digits than its factorization.

247804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 247804 is about 497.7991562870. The cubic root of 247804 is about 62.8110573252.

The spelling of 247804 in words is "two hundred forty-seven thousand, eight hundred four".