1368656820 has 72 divisors (see below), whose sum is σ = 4285532160. Its totient is φ = 353200320.

The previous prime is 1368656819. The next prime is 1368656833. The reversal of 1368656820 is 286568631.

1368656820 is a `hidden beast` number, since 1 + 3 + 6 + 86 + 568 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117060 + ... + 128219.

It is an arithmetic number, because the mean of its divisors is an integer number (59521280).

Almost surely, 2^1368656820 is an apocalyptic number.

1368656820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1368656820 is an abundant number, since it is smaller than the sum of its proper divisors (2916875340).

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

1368656820 is a wasteful number, since it uses less digits than its factorization.

1368656820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245325 (or 245320 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 1368656820 is about 36995.3621417604. The cubic root of 1368656820 is about 1110.2774568156.

The spelling of 1368656820 in words is "one billion, three hundred sixty-eight million, six hundred fifty-six thousand, eight hundred twenty".