87489064 has 16 divisors (see below), whose sum is σ = 176660820. Its totient is φ = 40379520.

The previous prime is 87489049. The next prime is 87489071. The reversal of 87489064 is 46098478.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 87422500 + 66564 = 9350^2 + 258^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420517 + ... + 420724.

Almost surely, 2^87489064 is an apocalyptic number.

It is an amenable number.

87489064 is an abundant number, since it is smaller than the sum of its proper divisors (89171756).

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

87489064 is a wasteful number, since it uses less digits than its factorization.

87489064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841260 (or 841256 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 87489064 is about 9353.5588948806. The cubic root of 87489064 is about 443.9335046375.

The spelling of 87489064 in words is "eighty-seven million, four hundred eighty-nine thousand, sixty-four".