1288200140 has 24 divisors (see below), whose sum is σ = 2778335952. Its totient is φ = 501353280.

The previous prime is 1288200131. The next prime is 1288200161. The reversal of 1288200140 is 410028821.

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, 869666 + ... + 871145.

It is an arithmetic number, because the mean of its divisors is an integer number (115763998).

Almost surely, 2^1288200140 is an apocalyptic number.

1288200140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1288200140 is an abundant number, since it is smaller than the sum of its proper divisors (1490135812).

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

1288200140 is a wasteful number, since it uses less digits than its factorization.

1288200140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740857 (or 1740855 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 1288200140 is about 35891.5051230789. The cubic root of 1288200140 is about 1088.0807175463.

Adding to 1288200140 its reverse (410028821), we get a palindrome (1698228961).

The spelling of 1288200140 in words is "one billion, two hundred eighty-eight million, two hundred thousand, one hundred forty".