68471424 has 144 divisors (see below), whose sum is σ = 229391370. Its totient is φ = 19547136.

The previous prime is 68471419. The next prime is 68471441. The reversal of 68471424 is 42417486.

It can be written as a sum of positive squares in only one way, i.e., 67765824 + 705600 = 8232^2 + 840^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 55842 + ... + 57054.

Almost surely, 2^68471424 is an apocalyptic number.

68471424 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 68471424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114695685).

68471424 is an abundant number, since it is smaller than the sum of its proper divisors (160919946).

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

68471424 is a wasteful number, since it uses less digits than its factorization.

68471424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1225 counting only the distinct ones).

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

The square root of 68471424 is about 8274.7461592486. The cubic root of 68471424 is about 409.1065693130.

The spelling of 68471424 in words is "sixty-eight million, four hundred seventy-one thousand, four hundred twenty-four".