2730420 has 144 divisors (see below), whose sum is σ = 10378368. Its totient is φ = 564480.

The previous prime is 2730397. The next prime is 2730439. The reversal of 2730420 is 240372.

It is a happy number.

2730420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 2730393 and 2730402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13762 + ... + 13958.

It is an arithmetic number, because the mean of its divisors is an integer number (72072).

2^2730420 is an apocalyptic number.

2730420 is a gapful number since it is divisible by the number (20) 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 2730420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5189184).

2730420 is an abundant number, since it is smaller than the sum of its proper divisors (7647948).

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

2730420 is a wasteful number, since it uses less digits than its factorization.

2730420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 225 counting only the distinct ones).

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

The square root of 2730420 is about 1652.3982570797. The cubic root of 2730420 is about 139.7686655752.

Adding to 2730420 its reverse (240372), we get a palindrome (2970792).

The spelling of 2730420 in words is "two million, seven hundred thirty thousand, four hundred twenty".