1228657384 has 32 divisors (see below), whose sum is σ = 2401423200. Its totient is φ = 588602560.

The previous prime is 1228657369. The next prime is 1228657403. The reversal of 1228657384 is 4837568221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10179 + ... + 50605.

It is an arithmetic number, because the mean of its divisors is an integer number (75044475).

Almost surely, 2^1228657384 is an apocalyptic number.

It is an amenable number.

1228657384 is a deficient number, since it is larger than the sum of its proper divisors (1172765816).

1228657384 is a wasteful number, since it uses less digits than its factorization.

1228657384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40593 (or 40589 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 1228657384 is about 35052.2094025469. The cubic root of 1228657384 is about 1071.0512810935.

The spelling of 1228657384 in words is "one billion, two hundred twenty-eight million, six hundred fifty-seven thousand, three hundred eighty-four".