87458512 has 30 divisors (see below), whose sum is σ = 177155762. Its totient is φ = 41823936.

The previous prime is 87458479. The next prime is 87458521. The reversal of 87458512 is 21585478.

87458512 = 1939² + 1940² + ... + 1961².

It can be written as a sum of positive squares in only one way, i.e., 81288256 + 6170256 = 9016^2 + 2484^2 .

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 5 ways as a sum of consecutive naturals, for example, 3298 + ... + 13630.

Almost surely, 2^87458512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87458512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88577881).

87458512 is an abundant number, since it is smaller than the sum of its proper divisors (89697250).

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

87458512 is a wasteful number, since it uses less digits than its factorization.

87458512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387 (or 10358 counting only the distinct ones).

The product of its digits is 89600, while the sum is 40.

The square root of 87458512 is about 9351.9255771205. The cubic root of 87458512 is about 443.8818233763.

The spelling of 87458512 in words is "eighty-seven million, four hundred fifty-eight thousand, five hundred twelve".