1228763893 has 16 divisors (see below), whose sum is σ = 1502250624. Its totient is φ = 981043200.

The previous prime is 1228763881. The next prime is 1228763897. The reversal of 1228763893 is 3983678221.

It is a cyclic number.

It is not a de Polignac number, because 1228763893 - 2²⁵ = 1195209461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228763897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41683 + ... + 64768.

It is an arithmetic number, because the mean of its divisors is an integer number (93890664).

Almost surely, 2^1228763893 is an apocalyptic number.

It is an amenable number.

1228763893 is a deficient number, since it is larger than the sum of its proper divisors (273486731).

1228763893 is a wasteful number, since it uses less digits than its factorization.

1228763893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106572.

The product of its digits is 870912, while the sum is 49.

The square root of 1228763893 is about 35053.7286604435. The cubic root of 1228763893 is about 1071.0822290498.

The spelling of 1228763893 in words is "one billion, two hundred twenty-eight million, seven hundred sixty-three thousand, eight hundred ninety-three".