87638895 has 32 divisors (see below), whose sum is σ = 158457600. Its totient is φ = 45944352.

The previous prime is 87638861. The next prime is 87638897. The reversal of 87638895 is 59883678.

It is a happy number.

It is not a de Polignac number, because 87638895 - 2¹¹ = 87636847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87638897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2464 + ... + 13466.

It is an arithmetic number, because the mean of its divisors is an integer number (4951800).

Almost surely, 2^87638895 is an apocalyptic number.

87638895 is a deficient number, since it is larger than the sum of its proper divisors (70818705).

87638895 is a wasteful number, since it uses less digits than its factorization.

87638895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11076 (or 11070 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 87638895 is about 9361.5647730494. The cubic root of 87638895 is about 444.1867822606.

The spelling of 87638895 in words is "eighty-seven million, six hundred thirty-eight thousand, eight hundred ninety-five".