86778427 has 8 divisors (see below), whose sum is σ = 89762400. Its totient is φ = 83835840.

The previous prime is 86778389. The next prime is 86778449. The reversal of 86778427 is 72487768.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86778427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86778487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6052 + ... + 14497.

It is an arithmetic number, because the mean of its divisors is an integer number (11220300).

Almost surely, 2^86778427 is an apocalyptic number.

86778427 is a deficient number, since it is larger than the sum of its proper divisors (2983973).

86778427 is a wasteful number, since it uses less digits than its factorization.

86778427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20693.

The product of its digits is 1053696, while the sum is 49.

The square root of 86778427 is about 9315.4939214193. The cubic root of 86778427 is about 442.7282735930.

The spelling of 86778427 in words is "eighty-six million, seven hundred seventy-eight thousand, four hundred twenty-seven".