1343020420 has 72 divisors (see below), whose sum is σ = 3325926744. Its totient is φ = 454132224.

The previous prime is 1343020411. The next prime is 1343020433. The reversal of 1343020420 is 240203431.

It can be written as a sum of positive squares in 4 ways, for example, as 602309764 + 740710656 = 24542^2 + 27216^2 .

It is a super-3 number, since 3×1343020420³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62154 + ... + 80926.

It is an arithmetic number, because the mean of its divisors is an integer number (46193427).

Almost surely, 2^1343020420 is an apocalyptic number.

1343020420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1343020420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662963372).

1343020420 is an abundant number, since it is smaller than the sum of its proper divisors (1982906324).

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

1343020420 is a wasteful number, since it uses less digits than its factorization.

1343020420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18869 (or 18860 counting only the distinct ones).

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

The square root of 1343020420 is about 36647.2430068075. The cubic root of 1343020420 is about 1103.3014916032.

Adding to 1343020420 its reverse (240203431), we get a palindrome (1583223851).

The spelling of 1343020420 in words is "one billion, three hundred forty-three million, twenty thousand, four hundred twenty".