87428193 has 8 divisors (see below), whose sum is σ = 118213056. Its totient is φ = 57464400.

The previous prime is 87428191. The next prime is 87428203. The reversal of 87428193 is 39182478.

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

It is not a de Polignac number, because 87428193 - 2¹ = 87428191 is a prime.

It is a super-3 number, since 3×87428193³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87428191) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 205018 + ... + 205443.

It is an arithmetic number, because the mean of its divisors is an integer number (14776632).

Almost surely, 2^87428193 is an apocalyptic number.

It is an amenable number.

87428193 is a deficient number, since it is larger than the sum of its proper divisors (30784863).

87428193 is a wasteful number, since it uses less digits than its factorization.

87428193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410535.

The product of its digits is 96768, while the sum is 42.

The square root of 87428193 is about 9350.3044335465. The cubic root of 87428193 is about 443.8305243540.

The spelling of 87428193 in words is "eighty-seven million, four hundred twenty-eight thousand, one hundred ninety-three".