168682390 has 8 divisors (see below), whose sum is σ = 303628320. Its totient is φ = 67472952.

The previous prime is 168682387. The next prime is 168682403. The reversal of 168682390 is 93286861.

168682390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×168682390² = 56907497392224200, 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 3 ways as a sum of consecutive naturals, for example, 8434110 + ... + 8434129.

It is an arithmetic number, because the mean of its divisors is an integer number (37953540).

Almost surely, 2^168682390 is an apocalyptic number.

168682390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168682390 is a deficient number, since it is larger than the sum of its proper divisors (134945930).

168682390 is a wasteful number, since it uses less digits than its factorization.

168682390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16868246.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 168682390 is about 12987.7784859459. The cubic root of 168682390 is about 552.5309142356.

The spelling of 168682390 in words is "one hundred sixty-eight million, six hundred eighty-two thousand, three hundred ninety".