1284536140 has 12 divisors (see below), whose sum is σ = 2697525936. Its totient is φ = 513814448.

The previous prime is 1284536117. The next prime is 1284536147. The reversal of 1284536140 is 416354821.

It is a junction number, because it is equal to n+sod(n) for n = 1284536096 and 1284536105.

It is not an unprimeable number, because it can be changed into a prime (1284536147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32113384 + ... + 32113423.

It is an arithmetic number, because the mean of its divisors is an integer number (224793828).

Almost surely, 2^1284536140 is an apocalyptic number.

1284536140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1284536140 is an abundant number, since it is smaller than the sum of its proper divisors (1412989796).

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

1284536140 is a wasteful number, since it uses less digits than its factorization.

1284536140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64226816 (or 64226814 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 1284536140 is about 35840.4260577354. The cubic root of 1284536140 is about 1087.0481364027.

The spelling of 1284536140 in words is "one billion, two hundred eighty-four million, five hundred thirty-six thousand, one hundred forty".