1366352240 has 80 divisors (see below), whose sum is σ = 3500106336. Its totient is φ = 491904000.

The previous prime is 1366352231. The next prime is 1366352257. The reversal of 1366352240 is 422536631.

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

It is a junction number, because it is equal to n+sod(n) for n = 1366352197 and 1366352206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81194 + ... + 96566.

Almost surely, 2^1366352240 is an apocalyptic number.

1366352240 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 1366352240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1750053168).

1366352240 is an abundant number, since it is smaller than the sum of its proper divisors (2133754096).

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

1366352240 is a wasteful number, since it uses less digits than its factorization.

1366352240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15498 (or 15492 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1366352240 is about 36964.2021420725. The cubic root of 1366352240 is about 1109.6539353511.

Adding to 1366352240 its reverse (422536631), we get a palindrome (1788888871).

The spelling of 1366352240 in words is "one billion, three hundred sixty-six million, three hundred fifty-two thousand, two hundred forty".