2720424 has 32 divisors (see below), whose sum is σ = 7773120. Its totient is φ = 777216.

The previous prime is 2720411. The next prime is 2720441. The reversal of 2720424 is 4240272.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2720424.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7929 + ... + 8264.

It is an arithmetic number, because the mean of its divisors is an integer number (242910).

2^2720424 is an apocalyptic number.

2720424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2720424 is an abundant number, since it is smaller than the sum of its proper divisors (5052696).

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

2720424 is a wasteful number, since it uses less digits than its factorization.

2720424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16209 (or 16205 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 2720424 is about 1649.3707891193. The cubic root of 2720424 is about 139.5978938005.

Adding to 2720424 its reverse (4240272), we get a palindrome (6960696).

The spelling of 2720424 in words is "two million, seven hundred twenty thousand, four hundred twenty-four".