87019490 has 8 divisors (see below), whose sum is σ = 156635100. Its totient is φ = 34807792.

The previous prime is 87019477. The next prime is 87019529. The reversal of 87019490 is 9491078.

It can be written as a sum of positive squares in 2 ways, for example, as 80874049 + 6145441 = 8993^2 + 2479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 4350965 + ... + 4350984.

Almost surely, 2^87019490 is an apocalyptic number.

87019490 is a deficient number, since it is larger than the sum of its proper divisors (69615610).

87019490 is a wasteful number, since it uses less digits than its factorization.

87019490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8701956.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 87019490 is about 9328.4237682472. The cubic root of 87019490 is about 443.1378482498.

The spelling of 87019490 in words is "eighty-seven million, nineteen thousand, four hundred ninety".