68147424 has 144 divisors (see below), whose sum is σ = 212284800. Its totient is φ = 20643840.

The previous prime is 68147381. The next prime is 68147437. The reversal of 68147424 is 42474186.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151552 + ... + 152000.

It is an arithmetic number, because the mean of its divisors is an integer number (1474200).

Almost surely, 2^68147424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68147424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106142400).

68147424 is an abundant number, since it is smaller than the sum of its proper divisors (144137376).

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

68147424 is a wasteful number, since it uses less digits than its factorization.

68147424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 502 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 68147424 is about 8255.1453045964. The cubic root of 68147424 is about 408.4602648935.

The spelling of 68147424 in words is "sixty-eight million, one hundred forty-seven thousand, four hundred twenty-four".