86305428 has 54 divisors (see below), whose sum is σ = 239808842. Its totient is φ = 26151840.

The previous prime is 86305411. The next prime is 86305441. The reversal of 86305428 is 82450368.

86305428 is a `hidden beast` number, since 86 + 30 + 542 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45319824 + 40985604 = 6732^2 + 6402^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 86305392 and 86305401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5551 + ... + 14262.

Almost surely, 2^86305428 is an apocalyptic number.

It is an amenable number.

86305428 is an abundant number, since it is smaller than the sum of its proper divisors (153503414).

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

86305428 is a wasteful number, since it uses less digits than its factorization.

86305428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19845 (or 19829 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 86305428 is about 9290.0714744290. The cubic root of 86305428 is about 441.9224217701.

The spelling of 86305428 in words is "eighty-six million, three hundred five thousand, four hundred twenty-eight".