168028865 has 8 divisors (see below), whose sum is σ = 206552808. Its totient is φ = 131144320.

The previous prime is 168028849. The next prime is 168028879. The reversal of 168028865 is 568820861.

It can be written as a sum of positive squares in 4 ways, for example, as 1825201 + 166203664 = 1351^2 + 12892^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168028865 - 2⁴ = 168028849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409622 + ... + 410031.

It is an arithmetic number, because the mean of its divisors is an integer number (25819101).

Almost surely, 2^168028865 is an apocalyptic number.

It is an amenable number.

168028865 is a deficient number, since it is larger than the sum of its proper divisors (38523943).

168028865 is an equidigital number, since it uses as much as digits as its factorization.

168028865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819699.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 168028865 is about 12962.5948405402. The cubic root of 168028865 is about 551.8164351913.

The spelling of 168028865 in words is "one hundred sixty-eight million, twenty-eight thousand, eight hundred sixty-five".