2645730 has 64 divisors (see below), whose sum is σ = 7257600. Its totient is φ = 685440.

The previous prime is 2645723. The next prime is 2645743. The reversal of 2645730 is 375462.

It is a happy number.

2645730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 2645694 and 2645703.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 10951 + ... + 11189.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2^2645730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2645730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3628800).

2645730 is an abundant number, since it is smaller than the sum of its proper divisors (4611870).

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

2645730 is a wasteful number, since it uses less digits than its factorization.

2645730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 2645730 is about 1626.5700107896. The cubic root of 2645730 is about 138.3083840749.

It can be divided in two parts, 2645 and 730, that added together give a cube (3375 = 15³).

The spelling of 2645730 in words is "two million, six hundred forty-five thousand, seven hundred thirty".