86812904 has 8 divisors (see below), whose sum is σ = 162774210. Its totient is φ = 43406448.

The previous prime is 86812903. The next prime is 86812909. The reversal of 86812904 is 40921868.

It can be written as a sum of positive squares in only one way, i.e., 50836900 + 35976004 = 7130^2 + 5998^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (86812903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5425799 + ... + 5425814.

Almost surely, 2^86812904 is an apocalyptic number.

It is an amenable number.

86812904 is a deficient number, since it is larger than the sum of its proper divisors (75961306).

86812904 is a wasteful number, since it uses less digits than its factorization.

86812904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10851619 (or 10851615 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 86812904 is about 9317.3442568148. The cubic root of 86812904 is about 442.7868976935.

The spelling of 86812904 in words is "eighty-six million, eight hundred twelve thousand, nine hundred four".