1283641640 has 32 divisors (see below), whose sum is σ = 2889216000. Its totient is φ = 513274944.

The previous prime is 1283641637. The next prime is 1283641651. The reversal of 1283641640 is 461463821.

It is a self number, because there is not a number n which added to its sum of digits gives 1283641640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208121 + ... + 214199.

It is an arithmetic number, because the mean of its divisors is an integer number (90288000).

Almost surely, 2^1283641640 is an apocalyptic number.

1283641640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1283641640 is an abundant number, since it is smaller than the sum of its proper divisors (1605574360).

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

1283641640 is a wasteful number, since it uses less digits than its factorization.

1283641640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11369 (or 11365 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 1283641640 is about 35827.9449592075. The cubic root of 1283641640 is about 1086.7957520801.

The spelling of 1283641640 in words is "one billion, two hundred eighty-three million, six hundred forty-one thousand, six hundred forty".