2729820 has 24 divisors (see below), whose sum is σ = 7643664. Its totient is φ = 727936.

The previous prime is 2729819. The next prime is 2729827. The reversal of 2729820 is 289272.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2729827) 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, 22689 + ... + 22808.

It is an arithmetic number, because the mean of its divisors is an integer number (318486).

2^2729820 is an apocalyptic number.

2729820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2729820 is an abundant number, since it is smaller than the sum of its proper divisors (4913844).

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

2729820 is a wasteful number, since it uses less digits than its factorization.

2729820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45509 (or 45507 counting only the distinct ones).

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

The square root of 2729820 is about 1652.2166928100. The cubic root of 2729820 is about 139.7584269376.

The spelling of 2729820 in words is "two million, seven hundred twenty-nine thousand, eight hundred twenty".