86781804 has 48 divisors (see below), whose sum is σ = 221810400. Its totient is φ = 26285056.

The previous prime is 86781791. The next prime is 86781811. The reversal of 86781804 is 40818768.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1419 + ... + 13250.

It is an arithmetic number, because the mean of its divisors is an integer number (4621050).

Almost surely, 2^86781804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86781804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110905200).

86781804 is an abundant number, since it is smaller than the sum of its proper divisors (135028596).

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

86781804 is a wasteful number, since it uses less digits than its factorization.

86781804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14722 (or 14720 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 86781804 is about 9315.6751768189. The cubic root of 86781804 is about 442.7340164718.

The spelling of 86781804 in words is "eighty-six million, seven hundred eighty-one thousand, eight hundred four".