1287828480 has 88 divisors (see below), whose sum is σ = 4119088032. Its totient is φ = 343416832.

The previous prime is 1287828461. The next prime is 1287828499. The reversal of 1287828480 is 848287821.

It is an interprime number because it is at equal distance from previous prime (1287828461) and next prime (1287828499).

It is a super-2 number, since 2×1287828480² = 3317004387798220800, 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26562 + ... + 57281.

Almost surely, 2^1287828480 is an apocalyptic number.

1287828480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287828480 is an abundant number, since it is smaller than the sum of its proper divisors (2831259552).

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

1287828480 is an equidigital number, since it uses as much as digits as its factorization.

1287828480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83871 (or 83853 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 48.

The square root of 1287828480 is about 35886.3272013172. The cubic root of 1287828480 is about 1087.9760663709.

The spelling of 1287828480 in words is "one billion, two hundred eighty-seven million, eight hundred twenty-eight thousand, four hundred eighty".