68264644 has 72 divisors (see below), whose sum is σ = 152832960. Its totient is φ = 26478144.

The previous prime is 68264617. The next prime is 68264681. The reversal of 68264644 is 44646286.

It is a junction number, because it is equal to n+sod(n) for n = 68264597 and 68264606.

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, 85254 + ... + 86050.

It is an arithmetic number, because the mean of its divisors is an integer number (2122680).

Almost surely, 2^68264644 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 68264644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76416480).

68264644 is an abundant number, since it is smaller than the sum of its proper divisors (84568316).

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

68264644 is a wasteful number, since it uses less digits than its factorization.

68264644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 848 counting only the distinct ones).

The product of its digits is 221184, while the sum is 40.

The square root of 68264644 is about 8262.2420685913. The cubic root of 68264644 is about 408.6943274749.

The spelling of 68264644 in words is "sixty-eight million, two hundred sixty-four thousand, six hundred forty-four".