68736820 has 12 divisors (see below), whose sum is σ = 144347364. Its totient is φ = 27494720.

The previous prime is 68736809. The next prime is 68736821. The reversal of 68736820 is 2863786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29724304 + 39012516 = 5452^2 + 6246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68736821) 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, 1718401 + ... + 1718440.

It is an arithmetic number, because the mean of its divisors is an integer number (12028947).

Almost surely, 2^68736820 is an apocalyptic number.

It is an amenable number.

68736820 is an abundant number, since it is smaller than the sum of its proper divisors (75610544).

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

68736820 is a wasteful number, since it uses less digits than its factorization.

68736820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436850 (or 3436848 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 68736820 is about 8290.7671538887. The cubic root of 68736820 is about 409.6344550713.

The spelling of 68736820 in words is "sixty-eight million, seven hundred thirty-six thousand, eight hundred twenty".