1087691900 has 18 divisors (see below), whose sum is σ = 2360291640. Its totient is φ = 435076720.

The previous prime is 1087691863. The next prime is 1087691903. The reversal of 1087691900 is 91967801.

It is a happy number.

It is a super-3 number, since 3×1087691900³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087691903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5438360 + ... + 5438559.

Almost surely, 2^1087691900 is an apocalyptic number.

1087691900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1087691900 is an abundant number, since it is smaller than the sum of its proper divisors (1272599740).

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

1087691900 is a wasteful number, since it uses less digits than its factorization.

1087691900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10876933 (or 10876926 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 1087691900 is about 32980.1743476289. The cubic root of 1087691900 is about 1028.4155423112.

The spelling of 1087691900 in words is "one billion, eighty-seven million, six hundred ninety-one thousand, nine hundred".