68539264 has 64 divisors (see below), whose sum is σ = 147271680. Its totient is φ = 31680000.

The previous prime is 68539259. The next prime is 68539277. The reversal of 68539264 is 46293586.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 68539264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90889 + ... + 91639.

It is an arithmetic number, because the mean of its divisors is an integer number (2301120).

Almost surely, 2^68539264 is an apocalyptic number.

68539264 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 68539264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73635840).

68539264 is an abundant number, since it is smaller than the sum of its proper divisors (78732416).

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

68539264 is a wasteful number, since it uses less digits than its factorization.

68539264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 807 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 68539264 is about 8278.8443637986. The cubic root of 68539264 is about 409.2416360174.

The spelling of 68539264 in words is "sixty-eight million, five hundred thirty-nine thousand, two hundred sixty-four".