87506638 has 8 divisors (see below), whose sum is σ = 131483088. Its totient is φ = 43678944.

The previous prime is 87506611. The next prime is 87506663. The reversal of 87506638 is 83660578.

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

It is a junction number, because it is equal to n+sod(n) for n = 87506594 and 87506603.

It is a congruent number.

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, 35706 + ... + 38077.

It is an arithmetic number, because the mean of its divisors is an integer number (16435386).

Almost surely, 2^87506638 is an apocalyptic number.

87506638 is a deficient number, since it is larger than the sum of its proper divisors (43976450).

87506638 is a wasteful number, since it uses less digits than its factorization.

87506638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74378.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 87506638 is about 9354.4982762305. The cubic root of 87506638 is about 443.9632270765.

The spelling of 87506638 in words is "eighty-seven million, five hundred six thousand, six hundred thirty-eight".