168499400 has 24 divisors (see below), whose sum is σ = 391761570. Its totient is φ = 67399680.

The previous prime is 168499363. The next prime is 168499417. The reversal of 168499400 is 4994861.

It can be written as a sum of positive squares in 3 ways, for example, as 152226244 + 16273156 = 12338^2 + 4034^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 421049 + ... + 421448.

Almost surely, 2^168499400 is an apocalyptic number.

168499400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168499400 is an abundant number, since it is smaller than the sum of its proper divisors (223262170).

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

168499400 is a wasteful number, since it uses less digits than its factorization.

168499400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842513 (or 842504 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 168499400 is about 12980.7318745901. The cubic root of 168499400 is about 552.3310431145.

The spelling of 168499400 in words is "one hundred sixty-eight million, four hundred ninety-nine thousand, four hundred".