1340053220 has 72 divisors (see below), whose sum is σ = 3275250552. Its totient is φ = 458613760.

The previous prime is 1340053201. The next prime is 1340053241. The reversal of 1340053220 is 223500431.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19166884 + 1320886336 = 4378^2 + 36344^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1340053192 and 1340053201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24854 + ... + 57426.

It is an arithmetic number, because the mean of its divisors is an integer number (45489591).

Almost surely, 2^1340053220 is an apocalyptic number.

1340053220 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 1340053220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637625276).

1340053220 is an abundant number, since it is smaller than the sum of its proper divisors (1935197332).

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

1340053220 is a wasteful number, since it uses less digits than its factorization.

1340053220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32621 (or 32608 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1340053220 is about 36606.7373580329. The cubic root of 1340053220 is about 1102.4883666929.

Adding to 1340053220 its reverse (223500431), we get a palindrome (1563553651).

The spelling of 1340053220 in words is "one billion, three hundred forty million, fifty-three thousand, two hundred twenty".