1288227894 has 32 divisors (see below), whose sum is σ = 2646483840. Its totient is φ = 417892992.

The previous prime is 1288227883. The next prime is 1288227917. The reversal of 1288227894 is 4987228821.

It is a super-2 number, since 2×1288227894² = 3319062213759350472, 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 15 ways as a sum of consecutive naturals, for example, 14062 + ... + 52670.

It is an arithmetic number, because the mean of its divisors is an integer number (82702620).

Almost surely, 2^1288227894 is an apocalyptic number.

1288227894 is an abundant number, since it is smaller than the sum of its proper divisors (1358255946).

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

1288227894 is a wasteful number, since it uses less digits than its factorization.

1288227894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38764.

The product of its digits is 1032192, while the sum is 51.

The square root of 1288227894 is about 35891.8917584459. The cubic root of 1288227894 is about 1088.0885316466.

The spelling of 1288227894 in words is "one billion, two hundred eighty-eight million, two hundred twenty-seven thousand, eight hundred ninety-four".