68644280 has 16 divisors (see below), whose sum is σ = 154449720. Its totient is φ = 27457696.

The previous prime is 68644267. The next prime is 68644307. The reversal of 68644280 is 8244686.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858014 + ... + 858093.

Almost surely, 2^68644280 is an apocalyptic number.

It is an amenable number.

68644280 is an abundant number, since it is smaller than the sum of its proper divisors (85805440).

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

68644280 is a wasteful number, since it uses less digits than its factorization.

68644280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716118 (or 1716114 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 68644280 is about 8285.1843672908. The cubic root of 68644280 is about 409.4505429807.

The spelling of 68644280 in words is "sixty-eight million, six hundred forty-four thousand, two hundred eighty".