168378020 has 12 divisors (see below), whose sum is σ = 353593884. Its totient is φ = 67351200.

The previous prime is 168377983. The next prime is 168378029. The reversal of 168378020 is 20873861.

It can be written as a sum of positive squares in 2 ways, for example, as 61089856 + 107288164 = 7816^2 + 10358^2 .

It is not an unprimeable number, because it can be changed into a prime (168378029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4209431 + ... + 4209470.

It is an arithmetic number, because the mean of its divisors is an integer number (29466157).

Almost surely, 2^168378020 is an apocalyptic number.

168378020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168378020 is an abundant number, since it is smaller than the sum of its proper divisors (185215864).

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

168378020 is a wasteful number, since it uses less digits than its factorization.

168378020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8418910 (or 8418908 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 168378020 is about 12976.0556410644. The cubic root of 168378020 is about 552.1983857745.

The spelling of 168378020 in words is "one hundred sixty-eight million, three hundred seventy-eight thousand, twenty".