1361591140 has 192 divisors, whose sum is σ = 3670023168. Its totient is φ = 412876800.

The previous prime is 1361591131. The next prime is 1361591213. The reversal of 1361591140 is 411951631.

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 63 ways as a sum of consecutive naturals, for example, 5297892 + ... + 5298148.

It is an arithmetic number, because the mean of its divisors is an integer number (19114704).

Almost surely, 2^1361591140 is an apocalyptic number.

1361591140 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 1361591140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1835011584).

1361591140 is an abundant number, since it is smaller than the sum of its proper divisors (2308432028).

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

1361591140 is a wasteful number, since it uses less digits than its factorization.

1361591140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 1361591140 is about 36899.7444435595. The cubic root of 1361591140 is about 1108.3635600075.

The spelling of 1361591140 in words is "one billion, three hundred sixty-one million, five hundred ninety-one thousand, one hundred forty".