1420343400 has 144 divisors (see below), whose sum is σ = 5122038240. Its totient is φ = 324643200.

The previous prime is 1420343377. The next prime is 1420343401. The reversal of 1420343400 is 43430241.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1420343401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5245 + ... + 53555.

It is an arithmetic number, because the mean of its divisors is an integer number (35569710).

Almost surely, 2^1420343400 is an apocalyptic number.

1420343400 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 1420343400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2561019120).

1420343400 is an abundant number, since it is smaller than the sum of its proper divisors (3701694840).

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

1420343400 is a wasteful number, since it uses less digits than its factorization.

1420343400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48344 (or 48328 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1420343400 is about 37687.4435322960. The cubic root of 1420343400 is about 1124.0814625845.

Adding to 1420343400 its reverse (43430241), we get a palindrome (1463773641).

The spelling of 1420343400 in words is "one billion, four hundred twenty million, three hundred forty-three thousand, four hundred".