1284155438 has 16 divisors (see below), whose sum is σ = 2005361280. Its totient is φ = 615984096.

The previous prime is 1284155417. The next prime is 1284155443. The reversal of 1284155438 is 8345514821.

It is a junction number, because it is equal to n+sod(n) for n = 1284155395 and 1284155404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61406 + ... + 79617.

It is an arithmetic number, because the mean of its divisors is an integer number (125335080).

Almost surely, 2^1284155438 is an apocalyptic number.

1284155438 is a deficient number, since it is larger than the sum of its proper divisors (721205842).

1284155438 is a wasteful number, since it uses less digits than its factorization.

1284155438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141211.

The product of its digits is 153600, while the sum is 41.

The square root of 1284155438 is about 35835.1145944868. The cubic root of 1284155438 is about 1086.9407351712.

The spelling of 1284155438 in words is "one billion, two hundred eighty-four million, one hundred fifty-five thousand, four hundred thirty-eight".