2729920 has 56 divisors (see below), whose sum is σ = 6858000. Its totient is φ = 1032192.

The previous prime is 2729917. The next prime is 2729921. The reversal of 2729920 is 299272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2729921) 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, 5856 + ... + 6304.

2^2729920 is an apocalyptic number.

2729920 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 2729920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3429000).

2729920 is an abundant number, since it is smaller than the sum of its proper divisors (4128080).

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

2729920 is a wasteful number, since it uses less digits than its factorization.

2729920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 2729920 is about 1652.2469549072. The cubic root of 2729920 is about 139.7601334813.

The spelling of 2729920 in words is "two million, seven hundred twenty-nine thousand, nine hundred twenty".