68154320 has 90 divisors (see below), whose sum is σ = 174036294. Its totient is φ = 24810240.

The previous prime is 68154319. The next prime is 68154323. The reversal of 68154320 is 2345186.

It can be written as a sum of positive squares in 3 ways, for example, as 322624 + 67831696 = 568^2 + 8236^2 .

It is a super-2 number, since 2×68154320² = 9290022669324800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68154323) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 959885 + ... + 959955.

Almost surely, 2^68154320 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 68154320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87018147).

68154320 is an abundant number, since it is smaller than the sum of its proper divisors (105881974).

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

68154320 is a wasteful number, since it uses less digits than its factorization.

68154320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 68154320 is about 8255.5629729292. The cubic root of 68154320 is about 408.4740421176.

The spelling of 68154320 in words is "sixty-eight million, one hundred fifty-four thousand, three hundred twenty".