1284270940 has 24 divisors (see below), whose sum is σ = 2699886672. Its totient is φ = 513152640.

The previous prime is 1284270937. The next prime is 1284270947. The reversal of 1284270940 is 490724821.

It is a self number, because there is not a number n which added to its sum of digits gives 1284270940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284270947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15526 + ... + 53005.

It is an arithmetic number, because the mean of its divisors is an integer number (112495278).

Almost surely, 2^1284270940 is an apocalyptic number.

1284270940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1284270940 is an abundant number, since it is smaller than the sum of its proper divisors (1415615732).

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

1284270940 is a wasteful number, since it uses less digits than its factorization.

1284270940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69477 (or 69475 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1284270940 is about 35836.7261339537. The cubic root of 1284270940 is about 1086.9733221051.

The spelling of 1284270940 in words is "one billion, two hundred eighty-four million, two hundred seventy thousand, nine hundred forty".