1087777856 has 28 divisors (see below), whose sum is σ = 2354793360. Its totient is φ = 494444160.

The previous prime is 1087777819. The next prime is 1087777903. The reversal of 1087777856 is 6587777801.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771866 + ... + 773273.

Almost surely, 2^1087777856 is an apocalyptic number.

1087777856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1087777856 is an abundant number, since it is smaller than the sum of its proper divisors (1267015504).

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

1087777856 is a wasteful number, since it uses less digits than its factorization.

1087777856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545162 (or 1545152 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 56.

The square root of 1087777856 is about 32981.4774684216. The cubic root of 1087777856 is about 1028.4426321387.

Subtracting 1087777856 from its reverse (6587777801), we obtain a palindrome (5499999945).

The spelling of 1087777856 in words is "one billion, eighty-seven million, seven hundred seventy-seven thousand, eight hundred fifty-six".