2645320 has 32 divisors (see below), whose sum is σ = 6100920. Its totient is φ = 1031680.

The previous prime is 2645311. The next prime is 2645329. The reversal of 2645320 is 235462.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2645311) and next prime (2645329).

It can be written as a sum of positive squares in 4 ways, for example, as 1592644 + 1052676 = 1262^2 + 1026^2 .

It is a d-powerful number, because it can be written as 2 + 6³ + 4⁷ + 5³ + 3¹² + 2²¹ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 2645291 and 2645300.

It is not an unprimeable number, because it can be changed into a prime (2645329) 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, 834 + ... + 2446.

2^2645320 is an apocalyptic number.

2645320 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 2645320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3050460).

2645320 is an abundant number, since it is smaller than the sum of its proper divisors (3455600).

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

2645320 is a wasteful number, since it uses less digits than its factorization.

2645320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2645320 is about 1626.4439738276. The cubic root of 2645320 is about 138.3012393087.

It can be divided in two parts, 2645 and 320, that multiplied together give a square (846400 = 920²).

The spelling of 2645320 in words is "two million, six hundred forty-five thousand, three hundred twenty".