87258642 has 32 divisors (see below), whose sum is σ = 183807360. Its totient is φ = 27561600.

The previous prime is 87258641. The next prime is 87258673. The reversal of 87258642 is 24685278.

It is a happy number.

It is a super-2 number, since 2×87258642² = 15228141207368328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87258594 and 87258603.

It is not an unprimeable number, because it can be changed into a prime (87258641) 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 15 ways as a sum of consecutive naturals, for example, 12142 + ... + 17942.

It is an arithmetic number, because the mean of its divisors is an integer number (5743980).

Almost surely, 2^87258642 is an apocalyptic number.

87258642 is an abundant number, since it is smaller than the sum of its proper divisors (96548718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87258642 is a wasteful number, since it uses less digits than its factorization.

87258642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5938.

The product of its digits is 215040, while the sum is 42.

The square root of 87258642 is about 9341.2334303346. The cubic root of 87258642 is about 443.5434292920.

The spelling of 87258642 in words is "eighty-seven million, two hundred fifty-eight thousand, six hundred forty-two".