1284396388 has 24 divisors (see below), whose sum is σ = 2453409504. Its totient is φ = 583488000.

The previous prime is 1284396361. The next prime is 1284396389. The reversal of 1284396388 is 8836934821.

It is not an unprimeable number, because it can be changed into a prime (1284396389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81988 + ... + 96388.

It is an arithmetic number, because the mean of its divisors is an integer number (102225396).

Almost surely, 2^1284396388 is an apocalyptic number.

It is an amenable number.

1284396388 is a deficient number, since it is larger than the sum of its proper divisors (1169013116).

1284396388 is a wasteful number, since it uses less digits than its factorization.

1284396388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16443 (or 16441 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 52.

The square root of 1284396388 is about 35838.4763627027. The cubic root of 1284396388 is about 1087.0087129211.

The spelling of 1284396388 in words is "one billion, two hundred eighty-four million, three hundred ninety-six thousand, three hundred eighty-eight".