87489512 has 16 divisors (see below), whose sum is σ = 178956000. Its totient is φ = 39767920.

The previous prime is 87489503. The next prime is 87489517. The reversal of 87489512 is 21598478.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (87489517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497012 + ... + 497187.

It is an arithmetic number, because the mean of its divisors is an integer number (11184750).

Almost surely, 2^87489512 is an apocalyptic number.

It is an amenable number.

87489512 is an abundant number, since it is smaller than the sum of its proper divisors (91466488).

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

87489512 is a wasteful number, since it uses less digits than its factorization.

87489512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994216 (or 994212 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The square root of 87489512 is about 9353.5828429538. The cubic root of 87489512 is about 443.9342623775.

The spelling of 87489512 in words is "eighty-seven million, four hundred eighty-nine thousand, five hundred twelve".