68443380 has 72 divisors (see below), whose sum is σ = 215316192. Its totient is φ = 18250272.

The previous prime is 68443379. The next prime is 68443387. The reversal of 68443380 is 8334486.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68443387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2182 + ... + 11901.

Almost surely, 2^68443380 is an apocalyptic number.

68443380 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 68443380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107658096).

68443380 is an abundant number, since it is smaller than the sum of its proper divisors (146872812).

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

68443380 is a wasteful number, since it uses less digits than its factorization.

68443380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14107 (or 14093 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 68443380 is about 8273.0514322105. The cubic root of 68443380 is about 409.0507087770.

The spelling of 68443380 in words is "sixty-eight million, four hundred forty-three thousand, three hundred eighty".