247764 has 24 divisors (see below), whose sum is σ = 631008. Its totient is φ = 75040.

The previous prime is 247759. The next prime is 247769. The reversal of 247764 is 467742.

It is an interprime number because it is at equal distance from previous prime (247759) and next prime (247769).

It is a super-2 number, since 2×247764² = 122773999392, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247769) by changing a digit.

247764 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 807 + ... + 1070.

It is an arithmetic number, because the mean of its divisors is an integer number (26292).

2²⁴⁷⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

247764 is an abundant number, since it is smaller than the sum of its proper divisors (383244).

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

247764 is a wasteful number, since it uses less digits than its factorization.

247764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895 (or 1893 counting only the distinct ones).

The product of its digits is 9408, while the sum is 30.

The square root of 247764 is about 497.7589778196. The cubic root of 247764 is about 62.8076775338.

The spelling of 247764 in words is "two hundred forty-seven thousand, seven hundred sixty-four".