68274320 has 20 divisors (see below), whose sum is σ = 158737980. Its totient is φ = 27309696.

The previous prime is 68274319. The next prime is 68274337. The reversal of 68274320 is 2347286.

It can be written as a sum of positive squares in 2 ways, for example, as 12503296 + 55771024 = 3536^2 + 7468^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×68274320² = 9322765542924800, which contains 22 as substring.

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, 426635 + ... + 426794.

It is an arithmetic number, because the mean of its divisors is an integer number (7936899).

Almost surely, 2^68274320 is an apocalyptic number.

It is an amenable number.

68274320 is an abundant number, since it is smaller than the sum of its proper divisors (90463660).

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

68274320 is a wasteful number, since it uses less digits than its factorization.

68274320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853442 (or 853436 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 68274320 is about 8262.8276031877. The cubic root of 68274320 is about 408.7136363452.

The spelling of 68274320 in words is "sixty-eight million, two hundred seventy-four thousand, three hundred twenty".