87090384 has 20 divisors (see below), whose sum is σ = 224983616. Its totient is φ = 29030112.

The previous prime is 87090379. The next prime is 87090391. The reversal of 87090384 is 48309078.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 907144 + ... + 907239.

Almost surely, 2^87090384 is an apocalyptic number.

It is an amenable number.

87090384 is an abundant number, since it is smaller than the sum of its proper divisors (137893232).

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

87090384 is a wasteful number, since it uses less digits than its factorization.

87090384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814394 (or 1814388 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 87090384 is about 9332.2228863224. Note that the first 3 decimals coincide. The cubic root of 87090384 is about 443.2581557314.

The spelling of 87090384 in words is "eighty-seven million, ninety thousand, three hundred eighty-four".