86578794 has 80 divisors (see below), whose sum is σ = 201979008. Its totient is φ = 27701568.

The previous prime is 86578787. The next prime is 86578799. The reversal of 86578794 is 49787568.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 86578794.

It is not an unprimeable number, because it can be changed into a prime (86578799) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 631894 + ... + 632030.

Almost surely, 2^86578794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86578794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100989504).

86578794 is an abundant number, since it is smaller than the sum of its proper divisors (115400214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86578794 is a wasteful number, since it uses less digits than its factorization.

86578794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 272 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 86578794 is about 9304.7726463359. The cubic root of 86578794 is about 442.3885154366.

The spelling of 86578794 in words is "eighty-six million, five hundred seventy-eight thousand, seven hundred ninety-four".