86218404 has 12 divisors (see below), whose sum is σ = 201176304. Its totient is φ = 28739464.

The previous prime is 86218369. The next prime is 86218423. The reversal of 86218404 is 40481268.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×86218404² = 14867226376614432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3592422 + ... + 3592445.

It is an arithmetic number, because the mean of its divisors is an integer number (16764692).

Almost surely, 2^86218404 is an apocalyptic number.

It is an amenable number.

86218404 is an abundant number, since it is smaller than the sum of its proper divisors (114957900).

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

86218404 is a wasteful number, since it uses less digits than its factorization.

86218404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184874 (or 7184872 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 86218404 is about 9285.3865832285. The cubic root of 86218404 is about 441.7738378746.

The spelling of 86218404 in words is "eighty-six million, two hundred eighteen thousand, four hundred four".