87638458 has 8 divisors (see below), whose sum is σ = 131538420. Its totient is φ = 43792320.

The previous prime is 87638449. The next prime is 87638491. The reversal of 87638458 is 85483678.

It can be written as a sum of positive squares in 2 ways, for example, as 66634569 + 21003889 = 8163^2 + 4583^2 .

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

It is a super-3 number, since 3×87638458³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9103 + ... + 16066.

Almost surely, 2^87638458 is an apocalyptic number.

87638458 is a deficient number, since it is larger than the sum of its proper divisors (43899962).

87638458 is a wasteful number, since it uses less digits than its factorization.

87638458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26912.

The product of its digits is 1290240, while the sum is 49.

The square root of 87638458 is about 9361.5414329052. The cubic root of 87638458 is about 444.1860439661.

The spelling of 87638458 in words is "eighty-seven million, six hundred thirty-eight thousand, four hundred fifty-eight".