1340203420 has 12 divisors (see below), whose sum is σ = 2814427224. Its totient is φ = 536081360.

The previous prime is 1340203409. The next prime is 1340203427. The reversal of 1340203420 is 243020431.

It is a super-2 number, since 2×1340203420² = 3592290413959392800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340203427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 33505066 + ... + 33505105.

It is an arithmetic number, because the mean of its divisors is an integer number (234535602).

Almost surely, 2^1340203420 is an apocalyptic number.

1340203420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340203420 is an abundant number, since it is smaller than the sum of its proper divisors (1474223804).

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

1340203420 is a wasteful number, since it uses less digits than its factorization.

1340203420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67010180 (or 67010178 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1340203420 is about 36608.7888354696. The cubic root of 1340203420 is about 1102.5295559938.

Adding to 1340203420 its reverse (243020431), we get a palindrome (1583223851).

The spelling of 1340203420 in words is "one billion, three hundred forty million, two hundred three thousand, four hundred twenty".