1340435220 has 24 divisors (see below), whose sum is σ = 3753218784. Its totient is φ = 357449376.

The previous prime is 1340435209. The next prime is 1340435231. The reversal of 1340435220 is 225340431.

It is an interprime number because it is at equal distance from previous prime (1340435209) and next prime (1340435231).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11170234 + ... + 11170353.

It is an arithmetic number, because the mean of its divisors is an integer number (156384116).

Almost surely, 2^1340435220 is an apocalyptic number.

1340435220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340435220 is an abundant number, since it is smaller than the sum of its proper divisors (2412783564).

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

1340435220 is a wasteful number, since it uses less digits than its factorization.

1340435220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22340599 (or 22340597 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1340435220 is about 36611.9546050194. The cubic root of 1340435220 is about 1102.5931163993.

Adding to 1340435220 its reverse (225340431), we get a palindrome (1565775651).

The spelling of 1340435220 in words is "one billion, three hundred forty million, four hundred thirty-five thousand, two hundred twenty".