1288985377 has 8 divisors (see below), whose sum is σ = 1299381120. Its totient is φ = 1278614400.

The previous prime is 1288985311. The next prime is 1288985413. The reversal of 1288985377 is 7735898821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1288985377 is a prime.

It is a super-2 number, since 2×1288985377² = 3322966604239664258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288985777) 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, 106449 + ... + 117937.

It is an arithmetic number, because the mean of its divisors is an integer number (162422640).

Almost surely, 2^1288985377 is an apocalyptic number.

It is an amenable number.

1288985377 is a deficient number, since it is larger than the sum of its proper divisors (10395743).

1288985377 is a wasteful number, since it uses less digits than its factorization.

1288985377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12383.

The product of its digits is 6773760, while the sum is 58.

The square root of 1288985377 is about 35902.4424935129. The cubic root of 1288985377 is about 1088.3017566192.

The spelling of 1288985377 in words is "one billion, two hundred eighty-eight million, nine hundred eighty-five thousand, three hundred seventy-seven".