87135478 has 8 divisors (see below), whose sum is σ = 131246280. Its totient is φ = 43386720.

The previous prime is 87135473. The next prime is 87135491. The reversal of 87135478 is 87453178.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87135473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89908 + ... + 90871.

It is an arithmetic number, because the mean of its divisors is an integer number (16405785).

Almost surely, 2^87135478 is an apocalyptic number.

87135478 is a deficient number, since it is larger than the sum of its proper divisors (44110802).

87135478 is a wasteful number, since it uses less digits than its factorization.

87135478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181022.

The product of its digits is 188160, while the sum is 43.

The square root of 87135478 is about 9334.6386111086. The cubic root of 87135478 is about 443.3346465121.

The spelling of 87135478 in words is "eighty-seven million, one hundred thirty-five thousand, four hundred seventy-eight".