1340169220 has 24 divisors (see below), whose sum is σ = 3030844824. Its totient is φ = 494831616.

The previous prime is 1340169203. The next prime is 1340169253. The reversal of 1340169220 is 229610431.

It can be written as a sum of positive squares in 4 ways, for example, as 159971904 + 1180197316 = 12648^2 + 34354^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2576989 + ... + 2577508.

It is an arithmetic number, because the mean of its divisors is an integer number (126285201).

Almost surely, 2^1340169220 is an apocalyptic number.

1340169220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340169220 is an abundant number, since it is smaller than the sum of its proper divisors (1690675604).

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

1340169220 is a wasteful number, since it uses less digits than its factorization.

1340169220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154519 (or 5154517 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1340169220 is about 36608.3217315408. The cubic root of 1340169220 is about 1102.5201776087.

Adding to 1340169220 its reverse (229610431), we get a palindrome (1569779651).

It can be divided in two parts, 13401 and 69220, that added together give a triangular number (82621 = T₄₀₆).

The spelling of 1340169220 in words is "one billion, three hundred forty million, one hundred sixty-nine thousand, two hundred twenty".