1205343040 has 112 divisors (see below), whose sum is σ = 3150290880. Its totient is φ = 435630080.

The previous prime is 1205343031. The next prime is 1205343079. The reversal of 1205343040 is 403435021.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629124 + ... + 631036.

Almost surely, 2^1205343040 is an apocalyptic number.

1205343040 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 1205343040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575145440).

1205343040 is an abundant number, since it is smaller than the sum of its proper divisors (1944947840).

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

1205343040 is a wasteful number, since it uses less digits than its factorization.

1205343040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120 (or 2110 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1205343040 is about 34718.0506365205. The cubic root of 1205343040 is about 1064.2334083826.

Adding to 1205343040 its reverse (403435021), we get a palindrome (1608778061).

The spelling of 1205343040 in words is "one billion, two hundred five million, three hundred forty-three thousand, forty".