1340222020 has 12 divisors (see below), whose sum is σ = 2814466284. Its totient is φ = 536088800.

The previous prime is 1340222011. The next prime is 1340222027. The reversal of 1340222020 is 202220431.

It can be written as a sum of positive squares in 2 ways, for example, as 465955396 + 874266624 = 21586^2 + 29568^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1340221985 and 1340222003.

It is not an unprimeable number, because it can be changed into a prime (1340222027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33505531 + ... + 33505570.

It is an arithmetic number, because the mean of its divisors is an integer number (234538857).

Almost surely, 2^1340222020 is an apocalyptic number.

1340222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340222020 is an abundant number, since it is smaller than the sum of its proper divisors (1474244264).

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

1340222020 is a wasteful number, since it uses less digits than its factorization.

1340222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67011110 (or 67011108 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1340222020 is about 36609.0428719463. The cubic root of 1340222020 is about 1102.5346564521.

Adding to 1340222020 its reverse (202220431), we get a palindrome (1542442451).

The spelling of 1340222020 in words is "one billion, three hundred forty million, two hundred twenty-two thousand, twenty".