68301840 has 40 divisors (see below), whose sum is σ = 211736448. Its totient is φ = 18213760.

The previous prime is 68301817. The next prime is 68301851. The reversal of 68301840 is 4810386.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 68301798 and 68301807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142056 + ... + 142535.

Almost surely, 2^68301840 is an apocalyptic number.

68301840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68301840 is an abundant number, since it is smaller than the sum of its proper divisors (143434608).

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

68301840 is a wasteful number, since it uses less digits than its factorization.

68301840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284607 (or 284601 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 68301840 is about 8264.4927249045. The cubic root of 68301840 is about 408.7685437070.

The spelling of 68301840 in words is "sixty-eight million, three hundred one thousand, eight hundred forty".