86172428 has 12 divisors (see below), whose sum is σ = 150905832. Its totient is φ = 43056480.

The previous prime is 86172409. The next prime is 86172431. The reversal of 86172428 is 82427168.

It is a junction number, because it is equal to n+sod(n) for n = 86172391 and 86172400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113 + ... + 13128.

It is an arithmetic number, because the mean of its divisors is an integer number (12575486).

Almost surely, 2^86172428 is an apocalyptic number.

It is an amenable number.

86172428 is a deficient number, since it is larger than the sum of its proper divisors (64733404).

86172428 is a wasteful number, since it uses less digits than its factorization.

86172428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14872 (or 14870 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 86172428 is about 9282.9105349562. The cubic root of 86172428 is about 441.6952985513.

The spelling of 86172428 in words is "eighty-six million, one hundred seventy-two thousand, four hundred twenty-eight".