68306392 has 128 divisors (see below), whose sum is σ = 170496000. Its totient is φ = 25401600.

The previous prime is 68306377. The next prime is 68306393. The reversal of 68306392 is 29360386.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68306393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 935668 + ... + 935740.

It is an arithmetic number, because the mean of its divisors is an integer number (1332000).

Almost surely, 2^68306392 is an apocalyptic number.

68306392 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68306392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85248000).

68306392 is an abundant number, since it is smaller than the sum of its proper divisors (102189608).

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

68306392 is a wasteful number, since it uses less digits than its factorization.

68306392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 68306392 is about 8264.7681153194. The cubic root of 68306392 is about 408.7776243461. Note that the first 3 decimals are identical.

The spelling of 68306392 in words is "sixty-eight million, three hundred six thousand, three hundred ninety-two".