1287087278 has 16 divisors (see below), whose sum is σ = 1942790496. Its totient is φ = 639498240.

The previous prime is 1287087239. The next prime is 1287087281. The reversal of 1287087278 is 8727807821.

It is a super-2 number, since 2×1287087278² = 3313187322378898568, which contains 22 as substring.

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, 594518 + ... + 596678.

It is an arithmetic number, because the mean of its divisors is an integer number (121424406).

Almost surely, 2^1287087278 is an apocalyptic number.

1287087278 is a deficient number, since it is larger than the sum of its proper divisors (655703218).

1287087278 is a wasteful number, since it uses less digits than its factorization.

1287087278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899.

The product of its (nonzero) digits is 702464, while the sum is 50.

The square root of 1287087278 is about 35875.9986341844. The cubic root of 1287087278 is about 1087.7673002692.

The spelling of 1287087278 in words is "one billion, two hundred eighty-seven million, eighty-seven thousand, two hundred seventy-eight".