2720724 has 24 divisors (see below), whose sum is σ = 6683040. Its totient is φ = 859104.

The previous prime is 2720723. The next prime is 2720737. The reversal of 2720724 is 4270272.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2720694 and 2720703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5739 + ... + 6194.

It is an arithmetic number, because the mean of its divisors is an integer number (278460).

2^2720724 is an apocalyptic number.

It is an amenable number.

2720724 is an abundant number, since it is smaller than the sum of its proper divisors (3962316).

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

2720724 is a wasteful number, since it uses less digits than its factorization.

2720724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11959 (or 11957 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 2720724 is about 1649.4617303836. The cubic root of 2720724 is about 139.6030250875.

Adding to 2720724 its reverse (4270272), we get a palindrome (6990996).

The spelling of 2720724 in words is "two million, seven hundred twenty thousand, seven hundred twenty-four".