68543780 has 24 divisors (see below), whose sum is σ = 144176760. Its totient is φ = 27372800.

The previous prime is 68543777. The next prime is 68543801. The reversal of 68543780 is 8734586.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23600164 + 44943616 = 4858^2 + 6704^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11576 + ... + 16464.

It is an arithmetic number, because the mean of its divisors is an integer number (6007365).

Almost surely, 2^68543780 is an apocalyptic number.

It is an amenable number.

68543780 is an abundant number, since it is smaller than the sum of its proper divisors (75632980).

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

68543780 is a wasteful number, since it uses less digits than its factorization.

68543780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599 (or 5597 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 68543780 is about 8279.1171026867. The cubic root of 68543780 is about 409.2506240267.

The spelling of 68543780 in words is "sixty-eight million, five hundred forty-three thousand, seven hundred eighty".