1228216894 has 8 divisors (see below), whose sum is σ = 1842474168. Its totient is φ = 614058840.

The previous prime is 1228216889. The next prime is 1228216909. The reversal of 1228216894 is 4986128221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1228216894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34549 + ... + 60415.

It is an arithmetic number, because the mean of its divisors is an integer number (230309271).

Almost surely, 2^1228216894 is an apocalyptic number.

1228216894 is a deficient number, since it is larger than the sum of its proper divisors (614257274).

1228216894 is a wasteful number, since it uses less digits than its factorization.

1228216894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49610.

The product of its digits is 110592, while the sum is 43.

The square root of 1228216894 is about 35045.9254978378. The cubic root of 1228216894 is about 1070.9232704219.

The spelling of 1228216894 in words is "one billion, two hundred twenty-eight million, two hundred sixteen thousand, eight hundred ninety-four".