168280390 has 16 divisors (see below), whose sum is σ = 308039760. Its totient is φ = 66171040.

The previous prime is 168280363. The next prime is 168280423. The reversal of 168280390 is 93082861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142021 + ... + 143200.

It is an arithmetic number, because the mean of its divisors is an integer number (19252485).

Almost surely, 2^168280390 is an apocalyptic number.

168280390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168280390 is a deficient number, since it is larger than the sum of its proper divisors (139759370).

168280390 is a wasteful number, since it uses less digits than its factorization.

168280390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285287.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 168280390 is about 12972.2931665916. The cubic root of 168280390 is about 552.0916387628.

The spelling of 168280390 in words is "one hundred sixty-eight million, two hundred eighty thousand, three hundred ninety".