1087391336 has 16 divisors (see below), whose sum is σ = 2049425700. Its totient is φ = 540877824.

The previous prime is 1087391329. The next prime is 1087391339. The reversal of 1087391336 is 6331937801.

It can be written as a sum of positive squares in 2 ways, for example, as 1042902436 + 44488900 = 32294^2 + 6670^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1087391293 and 1087391302.

It is not an unprimeable number, because it can be changed into a prime (1087391339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350591 + ... + 353678.

Almost surely, 2^1087391336 is an apocalyptic number.

It is an amenable number.

1087391336 is a deficient number, since it is larger than the sum of its proper divisors (962034364).

1087391336 is a wasteful number, since it uses less digits than its factorization.

1087391336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704468 (or 704464 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1087391336 is about 32975.6172952077. The cubic root of 1087391336 is about 1028.3208055678.

The spelling of 1087391336 in words is "one billion, eighty-seven million, three hundred ninety-one thousand, three hundred thirty-six".