1280828736 has 168 divisors, whose sum is σ = 4134843648. Its totient is φ = 375552000.

The previous prime is 1280828729. The next prime is 1280828743. The reversal of 1280828736 is 6378280821.

It is an interprime number because it is at equal distance from previous prime (1280828729) and next prime (1280828743).

It is a junction number, because it is equal to n+sod(n) for n = 1280828691 and 1280828700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193156 + ... + 199676.

Almost surely, 2^1280828736 is an apocalyptic number.

1280828736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280828736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2067421824).

1280828736 is an abundant number, since it is smaller than the sum of its proper divisors (2854014912).

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

1280828736 is a wasteful number, since it uses less digits than its factorization.

1280828736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6581 (or 6568 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1280828736 is about 35788.6677036181. The cubic root of 1280828736 is about 1086.0013227093.

The spelling of 1280828736 in words is "one billion, two hundred eighty million, eight hundred twenty-eight thousand, seven hundred thirty-six".