87681550 has 24 divisors (see below), whose sum is σ = 177914952. Its totient is φ = 31884000.

The previous prime is 87681487. The next prime is 87681571. The reversal of 87681550 is 5518678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79161 + ... + 80260.

It is an arithmetic number, because the mean of its divisors is an integer number (7413123).

Almost surely, 2^87681550 is an apocalyptic number.

87681550 is an abundant number, since it is smaller than the sum of its proper divisors (90233402).

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

87681550 is a wasteful number, since it uses less digits than its factorization.

87681550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159444 (or 159439 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 87681550 is about 9363.8426941080. The cubic root of 87681550 is about 444.2588344172.

The spelling of 87681550 in words is "eighty-seven million, six hundred eighty-one thousand, five hundred fifty".