1288121370 has 16 divisors (see below), whose sum is σ = 3091491360. Its totient is φ = 343499024.

The previous prime is 1288121363. The next prime is 1288121407. The reversal of 1288121370 is 731218821.

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, 21468660 + ... + 21468719.

It is an arithmetic number, because the mean of its divisors is an integer number (193218210).

Almost surely, 2^1288121370 is an apocalyptic number.

1288121370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1288121370 is an abundant number, since it is smaller than the sum of its proper divisors (1803369990).

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

1288121370 is a wasteful number, since it uses less digits than its factorization.

1288121370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42937389.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 1288121370 is about 35890.4077714366. The cubic root of 1288121370 is about 1088.0585393504.

The spelling of 1288121370 in words is "one billion, two hundred eighty-eight million, one hundred twenty-one thousand, three hundred seventy".