1287796224 has 360 divisors, whose sum is σ = 4182997896. Its totient is φ = 351436800.

The previous prime is 1287796217. The next prime is 1287796229. The reversal of 1287796224 is 4226977821.

It is a super-2 number, since 2×1287796224² = 3316838229097316352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287796229) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31409644 + ... + 31409684.

Almost surely, 2^1287796224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287796224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091498948).

1287796224 is an abundant number, since it is smaller than the sum of its proper divisors (2895201672).

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

1287796224 is a wasteful number, since it uses less digits than its factorization.

1287796224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 70 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 1287796224 is about 35885.8777794274. The cubic root of 1287796224 is about 1087.9669828504.

The spelling of 1287796224 in words is "one billion, two hundred eighty-seven million, seven hundred ninety-six thousand, two hundred twenty-four".