1288147772 has 12 divisors (see below), whose sum is σ = 2282794080. Its totient is φ = 635920896.

The previous prime is 1288147771. The next prime is 1288147787. The reversal of 1288147772 is 2777418821.

It is a happy number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288147771) 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, 2037893 + ... + 2038524.

It is an arithmetic number, because the mean of its divisors is an integer number (190232840).

Almost surely, 2^1288147772 is an apocalyptic number.

It is an amenable number.

1288147772 is a deficient number, since it is larger than the sum of its proper divisors (994646308).

1288147772 is a wasteful number, since it uses less digits than its factorization.

1288147772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076500 (or 4076498 counting only the distinct ones).

The product of its digits is 351232, while the sum is 47.

The square root of 1288147772 is about 35890.7755837067. The cubic root of 1288147772 is about 1088.0659731027.

The spelling of 1288147772 in words is "one billion, two hundred eighty-eight million, one hundred forty-seven thousand, seven hundred seventy-two".