1284128634 has 16 divisors (see below), whose sum is σ = 2568614400. Its totient is φ = 427983360.

The previous prime is 1284128621. The next prime is 1284128653. The reversal of 1284128634 is 4368214821.

It is a junction number, because it is equal to n+sod(n) for n = 1284128592 and 1284128601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64167 + ... + 81765.

It is an arithmetic number, because the mean of its divisors is an integer number (160538400).

Almost surely, 2^1284128634 is an apocalyptic number.

1284128634 is an abundant number, since it is smaller than the sum of its proper divisors (1284485766).

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

1284128634 is a wasteful number, since it uses less digits than its factorization.

1284128634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29765.

The product of its digits is 73728, while the sum is 39.

The square root of 1284128634 is about 35834.7406018238. The cubic root of 1284128634 is about 1086.9331725971.

The spelling of 1284128634 in words is "one billion, two hundred eighty-four million, one hundred twenty-eight thousand, six hundred thirty-four".