87691900 has 36 divisors (see below), whose sum is σ = 190720432. Its totient is φ = 34997760.

The previous prime is 87691889. The next prime is 87691909. The reversal of 87691900 is 919678.

It is a super-2 number, since 2×87691900² = 15379738651220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87691909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66649 + ... + 67951.

Almost surely, 2^87691900 is an apocalyptic number.

It is an amenable number.

87691900 is an abundant number, since it is smaller than the sum of its proper divisors (103028532).

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

87691900 is a wasteful number, since it uses less digits than its factorization.

87691900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990 (or 1983 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 87691900 is about 9364.3953355249. The cubic root of 87691900 is about 444.2763139516.

The spelling of 87691900 in words is "eighty-seven million, six hundred ninety-one thousand, nine hundred".