247444228 has 6 divisors (see below), whose sum is σ = 433027406. Its totient is φ = 123722112.

The previous prime is 247444217. The next prime is 247444229. The reversal of 247444228 is 822444742.

It can be written as a sum of positive squares in only one way, i.e., 216619524 + 30824704 = 14718^2 + 5552^2 .

It is a super-2 number, since 2×247444228² = 122457291941031968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247444229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30930525 + ... + 30930532.

Almost surely, 2^247444228 is an apocalyptic number.

It is an amenable number.

247444228 is a deficient number, since it is larger than the sum of its proper divisors (185583178).

247444228 is a wasteful number, since it uses less digits than its factorization.

247444228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61861061 (or 61861059 counting only the distinct ones).

The product of its digits is 114688, while the sum is 37.

The square root of 247444228 is about 15730.3600721662. The cubic root of 247444228 is about 627.8064538051.

The spelling of 247444228 in words is "two hundred forty-seven million, four hundred forty-four thousand, two hundred twenty-eight".