86387578 has 8 divisors (see below), whose sum is σ = 134049780. Its totient is φ = 41704320.

The previous prime is 86387573. The next prime is 86387579. The reversal of 86387578 is 87578368.

It can be written as a sum of positive squares in 2 ways, for example, as 85433049 + 954529 = 9243^2 + 977^2 .

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

It is not an unprimeable number, because it can be changed into a prime (86387573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744663 + ... + 744778.

Almost surely, 2^86387578 is an apocalyptic number.

86387578 is a deficient number, since it is larger than the sum of its proper divisors (47662202).

86387578 is a wasteful number, since it uses less digits than its factorization.

86387578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489472.

The product of its digits is 2257920, while the sum is 52.

The square root of 86387578 is about 9294.4918096688. The cubic root of 86387578 is about 442.0625922292.

The spelling of 86387578 in words is "eighty-six million, three hundred eighty-seven thousand, five hundred seventy-eight".