87157858 has 8 divisors (see below), whose sum is σ = 131308380. Its totient is φ = 43388400.

The previous prime is 87157753. The next prime is 87157859. The reversal of 87157858 is 85875178.

It can be written as a sum of positive squares in 2 ways, for example, as 79334649 + 7823209 = 8907^2 + 2797^2 .

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

It is a super-2 number, since 2×87157858² = 15192984422296328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87157859) 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, 94693 + ... + 95608.

Almost surely, 2^87157858 is an apocalyptic number.

87157858 is a deficient number, since it is larger than the sum of its proper divisors (44150522).

87157858 is a wasteful number, since it uses less digits than its factorization.

87157858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190532.

The product of its digits is 627200, while the sum is 49.

The square root of 87157858 is about 9335.8372950689. The cubic root of 87157858 is about 443.3725988300.

The spelling of 87157858 in words is "eighty-seven million, one hundred fifty-seven thousand, eight hundred fifty-eight".