247986864 has 30 divisors (see below), whose sum is σ = 694019196. Its totient is φ = 82662240.

The previous prime is 247986863. The next prime is 247986877. The reversal of 247986864 is 468689742.

It is a super-2 number, since 2×247986864² = 122994969433108992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247986864.

It is not an unprimeable number, because it can be changed into a prime (247986863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 860922 + ... + 861209.

Almost surely, 2^247986864 is an apocalyptic number.

247986864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

247986864 is an abundant number, since it is smaller than the sum of its proper divisors (446032332).

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

247986864 is a wasteful number, since it uses less digits than its factorization.

247986864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722145 (or 1722136 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 247986864 is about 15747.5986740836. The cubic root of 247986864 is about 628.2650374931.

The spelling of 247986864 in words is "two hundred forty-seven million, nine hundred eighty-six thousand, eight hundred sixty-four".