68399424 has 112 divisors (see below), whose sum is σ = 209946240. Its totient is φ = 21795840.

The previous prime is 68399417. The next prime is 68399431. The reversal of 68399424 is 42499386.

It is an interprime number because it is at equal distance from previous prime (68399417) and next prime (68399431).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 68399424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38884 + ... + 40604.

It is an arithmetic number, because the mean of its divisors is an integer number (1874520).

Almost surely, 2^68399424 is an apocalyptic number.

68399424 is a gapful number since it is divisible by the number (64) 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 68399424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104973120).

68399424 is an abundant number, since it is smaller than the sum of its proper divisors (141546816).

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

68399424 is a wasteful number, since it uses less digits than its factorization.

68399424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765 (or 1749 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 68399424 is about 8270.3944283208. The cubic root of 68399424 is about 408.9631225929.

The spelling of 68399424 in words is "sixty-eight million, three hundred ninety-nine thousand, four hundred twenty-four".