68780020 has 12 divisors (see below), whose sum is σ = 144438084. Its totient is φ = 27512000.

The previous prime is 68780009. The next prime is 68780053. The reversal of 68780020 is 2008786.

It can be written as a sum of positive squares in 2 ways, for example, as 13337104 + 55442916 = 3652^2 + 7446^2 .

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, 1719481 + ... + 1719520.

It is an arithmetic number, because the mean of its divisors is an integer number (12036507).

Almost surely, 2^68780020 is an apocalyptic number.

It is an amenable number.

68780020 is an abundant number, since it is smaller than the sum of its proper divisors (75658064).

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

68780020 is a wasteful number, since it uses less digits than its factorization.

68780020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439010 (or 3439008 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 68780020 is about 8293.3720524284. The cubic root of 68780020 is about 409.7202533498.

The spelling of 68780020 in words is "sixty-eight million, seven hundred eighty thousand, twenty".