1288881337 has 4 divisors (see below), whose sum is σ = 1344919680. Its totient is φ = 1232842996.

The previous prime is 1288881323. The next prime is 1288881403. The reversal of 1288881337 is 7331888821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7331888821 = 709 ⋅10341169.

It is a cyclic number.

It is not a de Polignac number, because 1288881337 - 2¹¹ = 1288879289 is a prime.

It is a super-2 number, since 2×1288881337² = 3322430201733815138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288881437) 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, 28019137 + ... + 28019182.

It is an arithmetic number, because the mean of its divisors is an integer number (336229920).

Almost surely, 2^1288881337 is an apocalyptic number.

It is an amenable number.

1288881337 is a deficient number, since it is larger than the sum of its proper divisors (56038343).

1288881337 is an equidigital number, since it uses as much as digits as its factorization.

1288881337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56038342.

The product of its digits is 516096, while the sum is 49.

The square root of 1288881337 is about 35900.9935377839. The cubic root of 1288881337 is about 1088.2724752006.

The spelling of 1288881337 in words is "one billion, two hundred eighty-eight million, eight hundred eighty-one thousand, three hundred thirty-seven".