168202420 has 24 divisors (see below), whose sum is σ = 374003784. Its totient is φ = 63323136.

The previous prime is 168202417. The next prime is 168202423. The reversal of 168202420 is 24202861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (168202417) and next prime (168202423).

It can be written as a sum of positive squares in 4 ways, for example, as 56942116 + 111260304 = 7546^2 + 10548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168202423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247017 + ... + 247696.

It is an arithmetic number, because the mean of its divisors is an integer number (15583491).

Almost surely, 2^168202420 is an apocalyptic number.

168202420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168202420 is an abundant number, since it is smaller than the sum of its proper divisors (205801364).

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

168202420 is a wasteful number, since it uses less digits than its factorization.

168202420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494739 (or 494737 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 168202420 is about 12969.2875671719. The cubic root of 168202420 is about 552.0063580098.

It can be divided in two parts, 16820 and 2420, that multiplied together give a square (40704400 = 6380²).

The spelling of 168202420 in words is "one hundred sixty-eight million, two hundred two thousand, four hundred twenty".