68621320 has 16 divisors (see below), whose sum is σ = 154398060. Its totient is φ = 27448512.

The previous prime is 68621317. The next prime is 68621327. The reversal of 68621320 is 2312686.

It can be written as a sum of positive squares in 2 ways, for example, as 68128516 + 492804 = 8254^2 + 702^2 .

It is not an unprimeable number, because it can be changed into a prime (68621327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857727 + ... + 857806.

Almost surely, 2^68621320 is an apocalyptic number.

It is an amenable number.

68621320 is an abundant number, since it is smaller than the sum of its proper divisors (85776740).

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

68621320 is a wasteful number, since it uses less digits than its factorization.

68621320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715544 (or 1715540 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 68621320 is about 8283.7986455490. The cubic root of 68621320 is about 409.4048871601.

The spelling of 68621320 in words is "sixty-eight million, six hundred twenty-one thousand, three hundred twenty".