1340543220 has 48 divisors (see below), whose sum is σ = 3769136448. Its totient is φ = 355991040.

The previous prime is 1340543213. The next prime is 1340543273. The reversal of 1340543220 is 223450431.

It is a super-2 number, since 2×1340543220² = 3594112249375936800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 31894 + ... + 60813.

It is an arithmetic number, because the mean of its divisors is an integer number (78523676).

Almost surely, 2^1340543220 is an apocalyptic number.

1340543220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340543220 is an abundant number, since it is smaller than the sum of its proper divisors (2428593228).

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

1340543220 is a wasteful number, since it uses less digits than its factorization.

1340543220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92960 (or 92958 counting only the distinct ones).

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

The square root of 1340543220 is about 36613.4295033940. The cubic root of 1340543220 is about 1102.6227278909.

Adding to 1340543220 its reverse (223450431), we get a palindrome (1563993651).

The spelling of 1340543220 in words is "one billion, three hundred forty million, five hundred forty-three thousand, two hundred twenty".