68439424 has 32 divisors (see below), whose sum is σ = 136916640. Its totient is φ = 34076160.

The previous prime is 68439407. The next prime is 68439443. The reversal of 68439424 is 42493486.

It is a tau number, because it is divible by the number of its divisors (32).

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, 33702 + ... + 35674.

It is an arithmetic number, because the mean of its divisors is an integer number (4278645).

Almost surely, 2^68439424 is an apocalyptic number.

68439424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

68439424 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

68439424 is a wasteful number, since it uses less digits than its factorization.

68439424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258 (or 2246 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 68439424 is about 8272.8123392230. The cubic root of 68439424 is about 409.0428276360.

The spelling of 68439424 in words is "sixty-eight million, four hundred thirty-nine thousand, four hundred twenty-four".