2793780 has 144 divisors (see below), whose sum is σ = 9906624. Its totient is φ = 629760.

The previous prime is 2793737. The next prime is 2793793. The reversal of 2793780 is 873972.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33619 + ... + 33701.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2^2793780 is an apocalyptic number.

2793780 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 2793780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4953312).

2793780 is an abundant number, since it is smaller than the sum of its proper divisors (7112844).

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

2793780 is a wasteful number, since it uses less digits than its factorization.

2793780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2793780 is about 1671.4604392566. The cubic root of 2793780 is about 140.8415301260.

The spelling of 2793780 in words is "two million, seven hundred ninety-three thousand, seven hundred eighty".