247740228 has 24 divisors (see below), whose sum is σ = 642289760. Its totient is φ = 82580040.

The previous prime is 247740223. The next prime is 247740239. The reversal of 247740228 is 822047742.

247740228 is a `hidden beast` number, since 247 + 7 + 402 + 2 + 8 = 666.

It is a super-3 number, since 3×247740228³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 247740192 and 247740201.

It is not an unprimeable number, because it can be changed into a prime (247740223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1146838 + ... + 1147053.

Almost surely, 2^247740228 is an apocalyptic number.

It is an amenable number.

247740228 is an abundant number, since it is smaller than the sum of its proper divisors (394549532).

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

247740228 is a wasteful number, since it uses less digits than its factorization.

247740228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293904 (or 2293896 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 247740228 is about 15739.7658178259. The cubic root of 247740228 is about 628.0566875141.

The spelling of 247740228 in words is "two hundred forty-seven million, seven hundred forty thousand, two hundred twenty-eight".