2653780 has 12 divisors (see below), whose sum is σ = 5572980. Its totient is φ = 1061504.

The previous prime is 2653753. The next prime is 2653789. The reversal of 2653780 is 873562.

2653780 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 2 ways, for example, as 427716 + 2226064 = 654^2 + 1492^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2653789) 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 3 ways as a sum of consecutive naturals, for example, 66325 + ... + 66364.

It is an arithmetic number, because the mean of its divisors is an integer number (464415).

2^2653780 is an apocalyptic number.

2653780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2653780 is an abundant number, since it is smaller than the sum of its proper divisors (2919200).

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

2653780 is a wasteful number, since it uses less digits than its factorization.

2653780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132698 (or 132696 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2653780 is about 1629.0426636525. The cubic root of 2653780 is about 138.4485161859.

The spelling of 2653780 in words is "two million, six hundred fifty-three thousand, seven hundred eighty".