68424720 has 240 divisors, whose sum is σ = 263590272. Its totient is φ = 14376960.

The previous prime is 68424703. The next prime is 68424721. The reversal of 68424720 is 2742486.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (68424721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283800 + ... + 284040.

Almost surely, 2^68424720 is an apocalyptic number.

68424720 is a gapful number since it is divisible by the number (60) 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 68424720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131795136).

68424720 is an abundant number, since it is smaller than the sum of its proper divisors (195165552).

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

68424720 is a wasteful number, since it uses less digits than its factorization.

68424720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 68424720 is about 8271.9235973261. The cubic root of 68424720 is about 409.0135316729.

The spelling of 68424720 in words is "sixty-eight million, four hundred twenty-four thousand, seven hundred twenty".