1288981624 has 32 divisors (see below), whose sum is σ = 2814225120. Its totient is φ = 541996416.

The previous prime is 1288981619. The next prime is 1288981693. The reversal of 1288981624 is 4261898821.

It is a super-2 number, since 2×1288981624² = 3322947254019354752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214179 + ... + 220114.

It is an arithmetic number, because the mean of its divisors is an integer number (87944535).

Almost surely, 2^1288981624 is an apocalyptic number.

1288981624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1288981624 is an abundant number, since it is smaller than the sum of its proper divisors (1525243496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1288981624 is a wasteful number, since it uses less digits than its factorization.

1288981624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434359 (or 434355 counting only the distinct ones).

The product of its digits is 442368, while the sum is 49.

The square root of 1288981624 is about 35902.3902268359. The cubic root of 1288981624 is about 1088.3007003878.

The spelling of 1288981624 in words is "one billion, two hundred eighty-eight million, nine hundred eighty-one thousand, six hundred twenty-four".