68864436 has 72 divisors (see below), whose sum is σ = 185596320. Its totient is φ = 21466944.

The previous prime is 68864429. The next prime is 68864441. The reversal of 68864436 is 63446886.

It is a junction number, because it is equal to n+sod(n) for n = 68864391 and 68864400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56166 + ... + 57378.

Almost surely, 2^68864436 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 68864436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92798160).

68864436 is an abundant number, since it is smaller than the sum of its proper divisors (116731884).

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

68864436 is a wasteful number, since it uses less digits than its factorization.

68864436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1320 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 68864436 is about 8298.4598571060. The cubic root of 68864436 is about 409.8878059067.

The spelling of 68864436 in words is "sixty-eight million, eight hundred sixty-four thousand, four hundred thirty-six".