1284011886 has 16 divisors (see below), whose sum is σ = 2571695568. Its totient is φ = 427392000.

The previous prime is 1284011873. The next prime is 1284011891. The reversal of 1284011886 is 6881104821.

1284011886 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 148435 + ... + 156846.

It is an arithmetic number, because the mean of its divisors is an integer number (160730973).

Almost surely, 2^1284011886 is an apocalyptic number.

1284011886 is an abundant number, since it is smaller than the sum of its proper divisors (1287683682).

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

1284011886 is a wasteful number, since it uses less digits than its factorization.

1284011886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305987.

The product of its (nonzero) digits is 24576, while the sum is 39.

The square root of 1284011886 is about 35833.1115869108. Note that the first 3 decimals coincide. The cubic root of 1284011886 is about 1086.9002316812.

The spelling of 1284011886 in words is "one billion, two hundred eighty-four million, eleven thousand, eight hundred eighty-six".