87195878 has 32 divisors (see below), whose sum is σ = 163503360. Its totient is φ = 33881760.

The previous prime is 87195863. The next prime is 87195887. The reversal of 87195878 is 87859178.

It is a happy number.

It is a super-2 number, since 2×87195878² = 15206242280381768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104768 + ... + 105596.

It is an arithmetic number, because the mean of its divisors is an integer number (5109480).

Almost surely, 2^87195878 is an apocalyptic number.

87195878 is a deficient number, since it is larger than the sum of its proper divisors (76307482).

87195878 is a wasteful number, since it uses less digits than its factorization.

87195878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532.

The product of its digits is 1128960, while the sum is 53.

The square root of 87195878 is about 9337.8733124840. The cubic root of 87195878 is about 443.4370587883.

The spelling of 87195878 in words is "eighty-seven million, one hundred ninety-five thousand, eight hundred seventy-eight".