1288380195 has 32 divisors (see below), whose sum is σ = 2307205440. Its totient is φ = 682110720.

The previous prime is 1288380161. The next prime is 1288380209. The reversal of 1288380195 is 5910838821.

It is a happy number.

1288380195 is a `hidden beast` number, since 1 + 2 + 88 + 380 + 195 = 666.

It is not a de Polignac number, because 1288380195 - 2¹⁵ = 1288347427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1288380195.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16336 + ... + 53325.

It is an arithmetic number, because the mean of its divisors is an integer number (72100170).

Almost surely, 2^1288380195 is an apocalyptic number.

1288380195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1288380195 is a deficient number, since it is larger than the sum of its proper divisors (1018825245).

1288380195 is a wasteful number, since it uses less digits than its factorization.

1288380195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69812 (or 69806 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 1288380195 is about 35894.0133587761. The cubic root of 1288380195 is about 1088.1314097849.

The spelling of 1288380195 in words is "one billion, two hundred eighty-eight million, three hundred eighty thousand, one hundred ninety-five".