1366812320 has 96 divisors (see below), whose sum is σ = 3350108160. Its totient is φ = 526417920.

The previous prime is 1366812281. The next prime is 1366812323. The reversal of 1366812320 is 232186631.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (1366812323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1184864 + ... + 1186016.

It is an arithmetic number, because the mean of its divisors is an integer number (34896960).

Almost surely, 2^1366812320 is an apocalyptic number.

1366812320 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 1366812320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1675054080).

1366812320 is an abundant number, since it is smaller than the sum of its proper divisors (1983295840).

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

1366812320 is a wasteful number, since it uses less digits than its factorization.

1366812320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1366812320 is about 36970.4249366977. The cubic root of 1366812320 is about 1109.7784694393.

Adding to 1366812320 its reverse (232186631), we get a palindrome (1598998951).

The spelling of 1366812320 in words is "one billion, three hundred sixty-six million, eight hundred twelve thousand, three hundred twenty".