87442858 has 4 divisors (see below), whose sum is σ = 131164290. Its totient is φ = 43721428.

The previous prime is 87442813. The next prime is 87442891. The reversal of 87442858 is 85824478.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85824478 = 2 ⋅42912239.

It can be written as a sum of positive squares in only one way, i.e., 83667609 + 3775249 = 9147^2 + 1943^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 21860713 + ... + 21860716.

Almost surely, 2^87442858 is an apocalyptic number.

87442858 is a deficient number, since it is larger than the sum of its proper divisors (43721432).

87442858 is a wasteful number, since it uses less digits than its factorization.

87442858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43721431.

The product of its digits is 573440, while the sum is 46.

The square root of 87442858 is about 9351.0885997300. The cubic root of 87442858 is about 443.8553386637.

The spelling of 87442858 in words is "eighty-seven million, four hundred forty-two thousand, eight hundred fifty-eight".