1368965890 has 32 divisors (see below), whose sum is σ = 2555804160. Its totient is φ = 527385600.

The previous prime is 1368965881. The next prime is 1368965891. The reversal of 1368965890 is 985698631.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1368965891) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 54946 + ... + 75874.

It is an arithmetic number, because the mean of its divisors is an integer number (79868880).

Almost surely, 2^1368965890 is an apocalyptic number.

1368965890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1368965890 is a deficient number, since it is larger than the sum of its proper divisors (1186838270).

1368965890 is a wasteful number, since it uses less digits than its factorization.

1368965890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21178.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The square root of 1368965890 is about 36999.5390511828. The cubic root of 1368965890 is about 1110.3610247881.

The spelling of 1368965890 in words is "one billion, three hundred sixty-eight million, nine hundred sixty-five thousand, eight hundred ninety".