1381194240 has 320 divisors, whose sum is σ = 4772908800. Its totient is φ = 339476480.

The previous prime is 1381194233. The next prime is 1381194247. The reversal of 1381194240 is 424911831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1381194233) and next prime (1381194247).

It is a tau number, because it is divible by the number of its divisors (320).

It is not an unprimeable number, because it can be changed into a prime (1381194247) by changing a digit.

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, 9269686 + ... + 9269834.

It is an arithmetic number, because the mean of its divisors is an integer number (14915340).

Almost surely, 2^1381194240 is an apocalyptic number.

1381194240 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 1381194240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2386454400).

1381194240 is an abundant number, since it is smaller than the sum of its proper divisors (3391714560).

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

1381194240 is a wasteful number, since it uses less digits than its factorization.

1381194240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1381194240 is about 37164.4216960254. The cubic root of 1381194240 is about 1113.6573461022.

The spelling of 1381194240 in words is "one billion, three hundred eighty-one million, one hundred ninety-four thousand, two hundred forty".