68539460 has 72 divisors (see below), whose sum is σ = 165908736. Its totient is φ = 23584320.

The previous prime is 68539453. The next prime is 68539469. The reversal of 68539460 is 6493586.

It is not an unprimeable number, because it can be changed into a prime (68539469) 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, 78989 + ... + 79851.

It is an arithmetic number, because the mean of its divisors is an integer number (2304288).

Almost surely, 2^68539460 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 68539460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82954368).

68539460 is an abundant number, since it is smaller than the sum of its proper divisors (97369276).

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

68539460 is a wasteful number, since it uses less digits than its factorization.

68539460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 68539460 is about 8278.8562011911. The cubic root of 68539460 is about 409.2420261163.

The spelling of 68539460 in words is "sixty-eight million, five hundred thirty-nine thousand, four hundred sixty".