1287380416 has 56 divisors (see below), whose sum is σ = 3073278080. Its totient is φ = 522692352.

The previous prime is 1287380401. The next prime is 1287380447. The reversal of 1287380416 is 6140837821.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67110 + ... + 84133.

Almost surely, 2^1287380416 is an apocalyptic number.

1287380416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1287380416 is an abundant number, since it is smaller than the sum of its proper divisors (1785897664).

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

1287380416 is a wasteful number, since it uses less digits than its factorization.

1287380416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151281 (or 151271 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1287380416 is about 35880.0838349076. The cubic root of 1287380416 is about 1087.8498747592.

The spelling of 1287380416 in words is "one billion, two hundred eighty-seven million, three hundred eighty thousand, four hundred sixteen".