1320200420 has 48 divisors (see below), whose sum is σ = 3456528768. Its totient is φ = 411490560.

The previous prime is 1320200419. The next prime is 1320200429. The reversal of 1320200420 is 240020231.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1320200395 and 1320200404.

It is not an unprimeable number, because it can be changed into a prime (1320200429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427097 + ... + 430176.

It is an arithmetic number, because the mean of its divisors is an integer number (72011016).

Almost surely, 2^1320200420 is an apocalyptic number.

1320200420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320200420 is an abundant number, since it is smaller than the sum of its proper divisors (2136328348).

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

1320200420 is a wasteful number, since it uses less digits than its factorization.

1320200420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857300 (or 857298 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1320200420 is about 36334.5623339542. The cubic root of 1320200420 is about 1097.0168261077.

Adding to 1320200420 its reverse (240020231), we get a palindrome (1560220651).

The spelling of 1320200420 in words is "one billion, three hundred twenty million, two hundred thousand, four hundred twenty".