86428428 has 12 divisors (see below), whose sum is σ = 201666360. Its totient is φ = 28809472.

The previous prime is 86428421. The next prime is 86428469. The reversal of 86428428 is 82482468.

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

It is a self number, because there is not a number n which added to its sum of digits gives 86428428.

It is not an unprimeable number, because it can be changed into a prime (86428421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3601173 + ... + 3601196.

It is an arithmetic number, because the mean of its divisors is an integer number (16805530).

Almost surely, 2^86428428 is an apocalyptic number.

It is an amenable number.

86428428 is an abundant number, since it is smaller than the sum of its proper divisors (115237932).

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

86428428 is a wasteful number, since it uses less digits than its factorization.

86428428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7202376 (or 7202374 counting only the distinct ones).

The product of its digits is 196608, while the sum is 42.

The square root of 86428428 is about 9296.6890880571. The cubic root of 86428428 is about 442.1322604680.

It can be divided in two parts, 864 and 28428, that added together give a palindrome (29292).

The spelling of 86428428 in words is "eighty-six million, four hundred twenty-eight thousand, four hundred twenty-eight".