168428500 has 24 divisors (see below), whose sum is σ = 367848936. Its totient is φ = 67371200.

The previous prime is 168428479. The next prime is 168428531. The reversal of 168428500 is 5824861.

It can be written as a sum of positive squares in 4 ways, for example, as 16 + 168428484 = 4^2 + 12978^2 .

It is a super-2 number, since 2×168428500² = 56736319224500000, which contains 22 as substring.

It is a congruent 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, 167929 + ... + 168928.

It is an arithmetic number, because the mean of its divisors is an integer number (15327039).

Almost surely, 2^168428500 is an apocalyptic number.

168428500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168428500 is an abundant number, since it is smaller than the sum of its proper divisors (199420436).

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

168428500 is a wasteful number, since it uses less digits than its factorization.

168428500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336876 (or 336864 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 168428500 is about 12978.0006164278. Note that the first 3 decimals coincide. The cubic root of 168428500 is about 552.2535635809.

The spelling of 168428500 in words is "one hundred sixty-eight million, four hundred twenty-eight thousand, five hundred".