1288334947 has 8 divisors (see below), whose sum is σ = 1334098800. Its totient is φ = 1242660384.

The previous prime is 1288334939. The next prime is 1288334951. The reversal of 1288334947 is 7494338821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1288334947 - 2³ = 1288334939 is a prime.

It is a super-2 number, since 2×1288334947² = 3319613871322985618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1288334947.

It is not an unprimeable number, because it can be changed into a prime (1288334917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7753 + ... + 51349.

It is an arithmetic number, because the mean of its divisors is an integer number (166762350).

Almost surely, 2^1288334947 is an apocalyptic number.

1288334947 is a deficient number, since it is larger than the sum of its proper divisors (45763853).

1288334947 is a wasteful number, since it uses less digits than its factorization.

1288334947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44645.

The product of its digits is 1161216, while the sum is 49.

The square root of 1288334947 is about 35893.3830531478. The cubic root of 1288334947 is about 1088.1186712194.

The spelling of 1288334947 in words is "one billion, two hundred eighty-eight million, three hundred thirty-four thousand, nine hundred forty-seven".