2725820 has 24 divisors (see below), whose sum is σ = 5805744. Its totient is φ = 1074816.

The previous prime is 2725819. The next prime is 2725823. The reversal of 2725820 is 285272.

It is a self number, because there is not a number n which added to its sum of digits gives 2725820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2725823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527 + ... + 2393.

It is an arithmetic number, because the mean of its divisors is an integer number (241906).

2^2725820 is an apocalyptic number.

2725820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2725820 is an abundant number, since it is smaller than the sum of its proper divisors (3079924).

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

2725820 is a wasteful number, since it uses less digits than its factorization.

2725820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2725820 is about 1651.0057540784. The cubic root of 2725820 is about 139.6901309839.

The spelling of 2725820 in words is "two million, seven hundred twenty-five thousand, eight hundred twenty".