1368989520 has 160 divisors (see below), whose sum is σ = 4485665280. Its totient is φ = 344424960.

The previous prime is 1368989519. The next prime is 1368989537. The reversal of 1368989520 is 259898631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1508907 + ... + 1509813.

It is an arithmetic number, because the mean of its divisors is an integer number (28035408).

Almost surely, 2^1368989520 is an apocalyptic number.

1368989520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1368989520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2242832640).

1368989520 is an abundant number, since it is smaller than the sum of its proper divisors (3116675760).

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

1368989520 is a wasteful number, since it uses less digits than its factorization.

1368989520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 1368989520 is about 36999.8583781073. The cubic root of 1368989520 is about 1110.3674134742.

The spelling of 1368989520 in words is "one billion, three hundred sixty-eight million, nine hundred eighty-nine thousand, five hundred twenty".