2651620 has 24 divisors (see below), whose sum is σ = 5604984. Its totient is φ = 1053696.

The previous prime is 2651617. The next prime is 2651629. The reversal of 2651620 is 261562.

2651620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 736164 + 1915456 = 858^2 + 1384^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2651591 and 2651600.

It is not an unprimeable number, because it can be changed into a prime (2651629) 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 7 ways as a sum of consecutive naturals, for example, 3604 + ... + 4276.

It is an arithmetic number, because the mean of its divisors is an integer number (233541).

2^2651620 is an apocalyptic number.

2651620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2651620 is an abundant number, since it is smaller than the sum of its proper divisors (2953364).

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

2651620 is a wasteful number, since it uses less digits than its factorization.

2651620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2651620 is about 1628.3795626327. The cubic root of 2651620 is about 138.4109433694.

The spelling of 2651620 in words is "two million, six hundred fifty-one thousand, six hundred twenty".