87638394 has 8 divisors (see below), whose sum is σ = 175276800. Its totient is φ = 29212796.

The previous prime is 87638387. The next prime is 87638399. The reversal of 87638394 is 49383678.

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

87638394 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87638399) by changing a digit.

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, 7303194 + ... + 7303205.

It is an arithmetic number, because the mean of its divisors is an integer number (21909600).

Almost surely, 2^87638394 is an apocalyptic number.

87638394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

87638394 is a wasteful number, since it uses less digits than its factorization.

87638394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14606404.

The product of its digits is 870912, while the sum is 48.

The square root of 87638394 is about 9361.5380146640. The cubic root of 87638394 is about 444.1859358404.

The spelling of 87638394 in words is "eighty-seven million, six hundred thirty-eight thousand, three hundred ninety-four".