730020420 has 36 divisors (see below), whose sum is σ = 2214395820. Its totient is φ = 194672064.

The previous prime is 730020407. The next prime is 730020461. The reversal of 730020420 is 24020037.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 85266756 + 644753664 = 9234^2 + 25392^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 730020393 and 730020402.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2027655 + ... + 2028014.

It is an arithmetic number, because the mean of its divisors is an integer number (61510995).

Almost surely, 2^730020420 is an apocalyptic number.

It is an amenable number.

730020420 is an abundant number, since it is smaller than the sum of its proper divisors (1484375400).

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

730020420 is a wasteful number, since it uses less digits than its factorization.

730020420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055684 (or 4055679 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 730020420 is about 27018.8900586238. The cubic root of 730020420 is about 900.4197301473.

Adding to 730020420 its reverse (24020037), we get a palindrome (754040457).

The spelling of 730020420 in words is "seven hundred thirty million, twenty thousand, four hundred twenty".