68979280 has 20 divisors (see below), whose sum is σ = 160377012. Its totient is φ = 27591680.

The previous prime is 68979271. The next prime is 68979283. The reversal of 68979280 is 8297986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18455616 + 50523664 = 4296^2 + 7108^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68979283) 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, 431041 + ... + 431200.

Almost surely, 2^68979280 is an apocalyptic number.

It is an amenable number.

68979280 is an abundant number, since it is smaller than the sum of its proper divisors (91397732).

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

68979280 is a wasteful number, since it uses less digits than its factorization.

68979280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862254 (or 862248 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 68979280 is about 8305.3765718359. The cubic root of 68979280 is about 410.1155335721.

The spelling of 68979280 in words is "sixty-eight million, nine hundred seventy-nine thousand, two hundred eighty".