86720558 has 8 divisors (see below), whose sum is σ = 131648328. Its totient is φ = 42837784.

The previous prime is 86720537. The next prime is 86720581. The reversal of 86720558 is 85502768.

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

It is a super-3 number, since 3×86720558³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 261041 + ... + 261372.

It is an arithmetic number, because the mean of its divisors is an integer number (16456041).

Almost surely, 2^86720558 is an apocalyptic number.

86720558 is a deficient number, since it is larger than the sum of its proper divisors (44927770).

86720558 is a wasteful number, since it uses less digits than its factorization.

86720558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522498.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 86720558 is about 9312.3873416004. The cubic root of 86720558 is about 442.6298392221.

It can be divided in two parts, 86720 and 558, that added together give a palindrome (87278).

The spelling of 86720558 in words is "eighty-six million, seven hundred twenty thousand, five hundred fifty-eight".