1284423498738 has 32 divisors (see below), whose sum is σ = 2855332296000. Its totient is φ = 427982488128.

The previous prime is 1284423498737. The next prime is 1284423498749. The reversal of 1284423498738 is 8378943244821.

It is a happy number.

1284423498738 is a `hidden beast` number, since 1 + 2 + 8 + 442 + 34 + 98 + 73 + 8 = 666.

It is a super-2 number, since 2×1284423498738² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1284423498737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4260631 + ... + 4552122.

It is an arithmetic number, because the mean of its divisors is an integer number (89229134250).

Almost surely, 2^{1284423498738} is an apocalyptic number.

1284423498738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1284423498738 is an abundant number, since it is smaller than the sum of its proper divisors (1570908797262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1284423498738 is a wasteful number, since it uses less digits than its factorization.

1284423498738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8815463 (or 8815457 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 63.

The spelling of 1284423498738 in words is "one trillion, two hundred eighty-four billion, four hundred twenty-three million, four hundred ninety-eight thousand, seven hundred thirty-eight".