1288294172 has 12 divisors (see below), whose sum is σ = 2459470776. Its totient is φ = 585588240.

The previous prime is 1288294171. The next prime is 1288294177. The reversal of 1288294172 is 2714928821.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 29279413 = 1288294172 / (1 + 2 + 8 + 8 + 2 + 9 + 4 + 1 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288294171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14639663 + ... + 14639750.

It is an arithmetic number, because the mean of its divisors is an integer number (204955898).

Almost surely, 2^1288294172 is an apocalyptic number.

It is an amenable number.

1288294172 is a deficient number, since it is larger than the sum of its proper divisors (1171176604).

1288294172 is a wasteful number, since it uses less digits than its factorization.

1288294172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29279428 (or 29279426 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 1288294172 is about 35892.8150470258. The cubic root of 1288294172 is about 1088.1071916719.

The spelling of 1288294172 in words is "one billion, two hundred eighty-eight million, two hundred ninety-four thousand, one hundred seventy-two".