86778601 has 32 divisors (see below), whose sum is σ = 111254528. Its totient is φ = 65862720.

The previous prime is 86778599. The next prime is 86778607. The reversal of 86778601 is 10687768.

It is not a de Polignac number, because 86778601 - 2¹ = 86778599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (86778607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262006 + ... + 262336.

It is an arithmetic number, because the mean of its divisors is an integer number (3476704).

Almost surely, 2^86778601 is an apocalyptic number.

It is an amenable number.

86778601 is a deficient number, since it is larger than the sum of its proper divisors (24475927).

86778601 is a wasteful number, since it uses less digits than its factorization.

86778601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 86778601 is about 9315.5032606940. The cubic root of 86778601 is about 442.7285694986.

The spelling of 86778601 in words is "eighty-six million, seven hundred seventy-eight thousand, six hundred one".