247135320 has 64 divisors (see below), whose sum is σ = 823788000. Its totient is φ = 65902464.

The previous prime is 247135313. The next prime is 247135327. The reversal of 247135320 is 23531742.

It is an interprime number because it is at equal distance from previous prime (247135313) and next prime (247135327).

It is a super-2 number, since 2×247135320² = 122151732783004800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247135327) 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 15 ways as a sum of consecutive naturals, for example, 113335 + ... + 115494.

Almost surely, 2^247135320 is an apocalyptic number.

247135320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247135320 is an abundant number, since it is smaller than the sum of its proper divisors (576652680).

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

247135320 is a wasteful number, since it uses less digits than its factorization.

247135320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228849 (or 228839 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 247135320 is about 15720.5381587273. The cubic root of 247135320 is about 627.5450949851.

The spelling of 247135320 in words is "two hundred forty-seven million, one hundred thirty-five thousand, three hundred twenty".