2645500 has 96 divisors (see below), whose sum is σ = 6971328. Its totient is φ = 864000.

The previous prime is 2645479. The next prime is 2645507. The reversal of 2645500 is 55462.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645507) 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 31 ways as a sum of consecutive naturals, for example, 71482 + ... + 71518.

It is an arithmetic number, because the mean of its divisors is an integer number (72618).

2^2645500 is an apocalyptic number.

2645500 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 2645500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3485664).

2645500 is an abundant number, since it is smaller than the sum of its proper divisors (4325828).

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

2645500 is a wasteful number, since it uses less digits than its factorization.

2645500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2645500 is about 1626.4993083306. The cubic root of 2645500 is about 138.3043761262.

It can be divided in two parts, 2645 and 500, that multiplied together give a square (1322500 = 1150²).

The spelling of 2645500 in words is "two million, six hundred forty-five thousand, five hundred".