68081340 has 48 divisors (see below), whose sum is σ = 191711520. Its totient is φ = 18051840.

The previous prime is 68081297. The next prime is 68081347. The reversal of 68081340 is 4318086.

It is a happy number.

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 = 68081298 and 68081307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68081347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7726 + ... + 13994.

It is an arithmetic number, because the mean of its divisors is an integer number (3993990).

Almost surely, 2^68081340 is an apocalyptic number.

68081340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68081340 is an abundant number, since it is smaller than the sum of its proper divisors (123630180).

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

68081340 is a wasteful number, since it uses less digits than its factorization.

68081340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6462 (or 6460 counting only the distinct ones).

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

The square root of 68081340 is about 8251.1417391777. The cubic root of 68081340 is about 408.3281913370.

The spelling of 68081340 in words is "sixty-eight million, eighty-one thousand, three hundred forty".