1366325280 has 192 divisors, whose sum is σ = 4800902400. Its totient is φ = 362926080.

The previous prime is 1366325263. The next prime is 1366325291. The reversal of 1366325280 is 825236631.

It is a happy number.

1366325280 is a `hidden beast` number, since 13 + 6 + 632 + 5 + 2 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 31 ways as a sum of consecutive naturals, for example, 1550440 + ... + 1551320.

It is an arithmetic number, because the mean of its divisors is an integer number (25004700).

Almost surely, 2^1366325280 is an apocalyptic number.

1366325280 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 1366325280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2400451200).

1366325280 is an abundant number, since it is smaller than the sum of its proper divisors (3434577120).

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

1366325280 is a wasteful number, since it uses less digits than its factorization.

1366325280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1366325280 is about 36963.8374631206. The cubic root of 1366325280 is about 1109.6466369727.

The spelling of 1366325280 in words is "one billion, three hundred sixty-six million, three hundred twenty-five thousand, two hundred eighty".