2729280 has 56 divisors (see below), whose sum is σ = 8668512. Its totient is φ = 727552.

The previous prime is 2729261. The next prime is 2729303. The reversal of 2729280 is 829272.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 462 + ... + 2381.

2^2729280 is an apocalyptic number.

2729280 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 2729280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4334256).

2729280 is an abundant number, since it is smaller than the sum of its proper divisors (5939232).

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

2729280 is a wasteful number, since it uses less digits than its factorization.

2729280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863 (or 2853 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2729280 is about 1652.0532679063. The cubic root of 2729280 is about 139.7492108809.

It can be divided in two parts, 27292 and 80, that added together give a palindrome (27372).

The spelling of 2729280 in words is "two million, seven hundred twenty-nine thousand, two hundred eighty".