1368739920 has 80 divisors (see below), whose sum is σ = 4246692480. Its totient is φ = 364687872.

The previous prime is 1368739907. The next prime is 1368739943. The reversal of 1368739920 is 299378631.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1368739920.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 487962 + ... + 490758.

It is an arithmetic number, because the mean of its divisors is an integer number (53083656).

Almost surely, 2^1368739920 is an apocalyptic number.

1368739920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1368739920 is an abundant number, since it is smaller than the sum of its proper divisors (2877952560).

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

1368739920 is a wasteful number, since it uses less digits than its factorization.

1368739920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852 (or 4846 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 1368739920 is about 36996.4852384656. The cubic root of 1368739920 is about 1110.2999270673.

The spelling of 1368739920 in words is "one billion, three hundred sixty-eight million, seven hundred thirty-nine thousand, nine hundred twenty".