2651820 has 48 divisors (see below), whose sum is σ = 7496160. Its totient is φ = 700416.

The previous prime is 2651819. The next prime is 2651821. The reversal of 2651820 is 281562.

2651820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2651819) and next prime (2651821).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11466 + ... + 11694.

It is an arithmetic number, because the mean of its divisors is an integer number (156170).

2^2651820 is an apocalyptic number.

2651820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2651820 is an abundant number, since it is smaller than the sum of its proper divisors (4844340).

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

2651820 is a wasteful number, since it uses less digits than its factorization.

2651820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2651820 is about 1628.4409722185. The cubic root of 2651820 is about 138.4144231909.

The spelling of 2651820 in words is "two million, six hundred fifty-one thousand, eight hundred twenty".