228650643 has 12 divisors (see below), whose sum is σ = 355678960. Its totient is φ = 140708016.

The previous prime is 228650633. The next prime is 228650647. The reversal of 228650643 is 346056822.

228650643 is a `hidden beast` number, since 2 + 2 + 8 + 6 + 5 + 0 + 643 = 666.

It is not a de Polignac number, because 228650643 - 2⁹ = 228650131 is a prime.

It is a super-2 number, since 2×228650643² = 104562233088626898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228650598 and 228650607.

It is not an unprimeable number, because it can be changed into a prime (228650647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 977023 + ... + 977256.

Almost surely, 2^228650643 is an apocalyptic number.

228650643 is a deficient number, since it is larger than the sum of its proper divisors (127028317).

228650643 is a wasteful number, since it uses less digits than its factorization.

228650643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954298 (or 1954295 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 228650643 is about 15121.1984644075. The cubic root of 228650643 is about 611.4920413469.

The spelling of 228650643 in words is "two hundred twenty-eight million, six hundred fifty thousand, six hundred forty-three".